Security Auditoria

fedora

Nota

Auditoria para Ambientes com Sistema Operacional Linux (Fedora/RHEL/CentOS)

Audit log:

[root@otoha ~]# uname -r
5.4.20-200.fc31.x86_64

[root@otoha ~]# hostnamectl
   Static hostname: otoha.argoproxy.br
         Icon name: computer-laptop
           Chassis: laptop
        Machine ID: 698253ff9d8c47248d1fdeef220cbca1
           Boot ID: 893b065b0d1945978cfc1bdd0f3af677
  Operating System: Fedora 31 (Workstation Edition)
       CPE OS Name: cpe:/o:fedoraproject:fedora:31
            Kernel: Linux 5.4.20-200.fc31.x86_64
      Architecture: x86-64


[root@otoha ~]# systemctl status auditd -l
● auditd.service - Security Auditing Service
   Loaded: loaded (/usr/lib/systemd/system/auditd.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2020-03-18 10:56:54 -03; 2 days ago
     Docs: man:auditd(8)
           https://github.com/linux-audit/audit-documentation
  Process: 812 ExecStart=/sbin/auditd (code=exited, status=0/SUCCESS)
  Process: 821 ExecStartPost=/sbin/augenrules --load (code=exited, status=0/SUCCESS)
 Main PID: 814 (auditd)
    Tasks: 4 (limit: 9386)
   Memory: 4.2M
      CPU: 182ms
   CGroup: /system.slice/auditd.service
           ├─814 /sbin/auditd
           └─816 /usr/sbin/sedispatch

aureport -x –summary:

[root@otoha ~]# aureport -x --summary
[sudo] password for andre:

Executable Summary Report
=================================
total  file
=================================
19457  /usr/lib/systemd/systemd
538  /usr/lib/systemd/systemd-update-utmp
410  /usr/bin/sudo
122  /usr/sbin/runuser
69  /usr/bin/pkexec
62  /usr/libexec/gdm-session-worker
62  /usr/sbin/sshd
52  /usr/bin/su
29  /usr/sbin/groupadd
15  /usr/sbin/useradd
10  /usr/sbin/usermod
4  /usr/lib/polkit-1/polkit-agent-helper-1
3  /usr/libexec/packagekitd
3  /usr/bin/gnome-shell
3  /usr/sbin/vsftpd
2  /usr/bin/passwd
1  /usr/libexec/gnome-initial-setup
1  /usr/bin/python2.7
1  /usr/sbin/userdel
1  /usr/lib64/virtualbox/VirtualBox
1  /usr/libexec/gdm-wayland-session
1  /usr/libexec/gdm-x-session

aureport –failed:

[root@otoha ~]# aureport --failed

Failed Summary Report
======================
Range of time in logs: 07/16/2017 17:28:12.032 - 03/18/2020 10:57:19.131
Selected time for report: 07/16/2017 17:28:12 - 03/18/2020 10:57:19.131
Number of changes in configuration: 0
Number of changes to accounts, groups, or roles: 8
Number of logins: 0
Number of failed logins: 1
Number of authentications: 0
Number of failed authentications: 1
Number of users: 2
Number of terminals: 3
Number of host names: 2
Number of executables: 4
Number of commands: 14
Number of files: 1
Number of AVC's: 13
Number of MAC events: 0
Number of failed syscalls: 0
Number of anomaly events: 0
Number of responses to anomaly events: 0
Number of crypto events: 0
Number of integrity events: 0
Number of virt events: 0
Number of keys: 0
Number of process IDs: 23
Number of events: 232

Nota

One of the main differences between ntpd and chronyd is in the algorithms used to control the computer’s clock. Things chronyd can do better than ntpd!

chrony Suite:

[root@otoha ~]# date -R
Fri, 20 Mar 2020 21:34:59 -0300

[root@otoha ~]# chronyc tracking
Reference ID    : C8A007C5 (gps.jd.ntp.br)
Stratum         : 2
Ref time (UTC)  : Sat Mar 21 00:10:24 2020
System time     : 0.002918260 seconds slow of NTP time
Last offset     : -0.003419104 seconds
RMS offset      : 0.014937137 seconds
Frequency       : 23.267 ppm slow
Residual freq   : -0.140 ppm
Skew            : 3.042 ppm
Root delay      : 0.011531984 seconds
Root dispersion : 0.036170207 seconds
Update interval : 3353.7 seconds
Leap status     : Normal


[root@otoha ~]# chronyc sources
210 Number of sources = 11
MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
^+ a.st1.ntp.br                  1   7   377    18  +1330us[+1330us] +/- 8656us
^? a.st1.ntp.br                  0   6     0     -     +0ns[   +0ns] +/-    0ns
^- c.st1.ntp.br                  1   9   377   424  -9757us[-5882us] +/-   28ms
^- d.st1.ntp.br                  1   7   377    39  +5438us[+5438us] +/-   13ms
^+ a.ntp.br                      2   9   377   478   -204us[+3648us] +/-   14ms
^? a.ntp.br                      0   6     0     -     +0ns[   +0ns] +/-    0ns
^- b.ntp.br                      2   9   377    33  +1653us[+1653us] +/-   51ms
^? b.ntp.br                      0   6     0     -     +0ns[   +0ns] +/-    0ns
^- c.ntp.br                      2  10   177   680  +3034us[+6798us] +/-   35ms
^* gps.jd.ntp.br                 1   8   377   106  +2418us[+6433us] +/- 6966us
^? gps.jd.ntp.br                 0   6     0     -     +0ns[   +0ns] +/-    0ns


[root@otoha ~]# systemctl status chronyd
● chronyd.service - NTP client/server
   Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2020-03-18 10:56:56 -03; 2 days ago
     Docs: man:chronyd(8)
           man:chrony.conf(5)
  Process: 868 ExecStart=/usr/sbin/chronyd $OPTIONS (code=exited, status=0/SUCCESS)
  Process: 952 ExecStartPost=/usr/libexec/chrony-helper update-daemon (code=exited, status=0/SUCCESS)
 Main PID: 950 (chronyd)
    Tasks: 1 (limit: 9386)
   Memory: 2.9M
      CPU: 663ms
   CGroup: /system.slice/chronyd.service
           └─950 /usr/sbin/chronyd

SSH Restrito:

Port 22
#AddressFamily any
ListenAddress 0.0.0.0
#ListenAddress ::

#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/ssh/ssh_host_ed25519_key

# Ciphers and keying
#RekeyLimit default none

# Logging
#SyslogFacility AUTH
SyslogFacility AUTHPRIV
LogLevel INFO

# Authentication:

#LoginGraceTime 2m
PermitRootLogin no
#StrictModes yes
MaxAuthTries 3
#MaxSessions 10

#PubkeyAuthentication yes

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
# but this is overridden so installations will only check .ssh/authorized_keys
AuthorizedKeysFile      .ssh/authorized_keys

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
PasswordAuthentication yes

Login SSH Nominal:

[root@otoha ~]# cat /etc/ssh/sshd_config | grep -i allow
# be allowed through the ChallengeResponseAuthentication and
#AllowAgentForwarding yes
#AllowTcpForwarding yes
AllowUsers andre

Protocolo IPV4 instalado e configurado e IPV6 desabilitado:

[root@otoha ~]# cat /etc/sysconfig/network-scripts/ifcfg-Aliens
ESSID=Aliens
MODE=Managed
KEY_MGMT=WPA-PSK
MAC_ADDRESS_RANDOMIZATION=default
TYPE=Wireless
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=Aliens
UUID=03324a37-1baf-478c-9e63-4d685d4ea370
DEVICE=wlp2s0
ONBOOT=yes
DNS1=192.168.1.18
DNS2=208.62.220.220
PEERDNS=no
ZONE=FedoraWorkstation

Regras de Firewall:

[root@otoha ~]# sudo firewall-cmd --state
running

[root@otoha ~]# sudo firewall-cmd --get-active-zones
FedoraWorkstation
  interfaces: eth0 wlp2s0
libvirt
  interfaces: virbr0

[root@otoha ~]# sudo firewall-cmd --get-default-zone
FedoraWorkstation

[root@otoha ~]# sudo firewall-cmd --list-services
Shoutcast dhcp dhcpv6 dhcpv6-client dns docker-registry ftp http https imap imaps ipp ipp-client mdns nfs ntp openvpn pptp samba samba-client ssh

[root@otoha ~]# sudo firewall-cmd --list-ports --zone=FedoraWorkstation
1025-65535/udp 1025-65535/tcp 15567/udp 22000/udp 1900/udp 8895/tcp 54807/tcp 9000/tcp

[root@otoha ~]# sudo firewall-cmd --zone=FedoraWorkstation --list-all
FedoraWorkstation (active)
  target: default
  icmp-block-inversion: no
  interfaces: eth0 wlp2s0
  sources:
  services: Shoutcast dhcp dhcpv6 dhcpv6-client dns docker-registry ftp http https imap imaps ipp ipp-client mdns nfs ntp openvpn pptp samba samba-client ssh
  ports: 1025-65535/udp 1025-65535/tcp 15567/udp 22000/udp 1900/udp 8895/tcp 54807/tcp 9000/tcp
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

Hard Disk Analysis:

[root@otoha ~]# sudo hdparm -C /dev/sda
/dev/sda:
 drive state is:  active/idle

[root@otoha ~]# sudo hdparm -tT /dev/sda
/dev/sda:
 Timing cached reads:   7316 MB in  2.00 seconds = 3664.79 MB/sec
 Timing buffered disk reads:  88 MB in  3.00 seconds =  29.33 MB/sec

[root@otoha ~]# sudo hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
    Model Number:       SAMSUNG HM500JI
    Serial Number:      S2NVJ56B704117
    Firmware Revision:  2AC101C4
    Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
Standards:
    Used: unknown (minor revision code 0x0028)
    Supported: 8 7 6 5
    Likely used: 8
Configuration:
    Logical         max     current
    cylinders       16383   16383
    heads           16      16
    sectors/track   63      63
    --
    CHS current addressable sectors:    16514064
    LBA    user addressable sectors:   268435455
    LBA48  user addressable sectors:   976773168
    Logical  Sector size:                   512 bytes
    Physical Sector size:                   512 bytes
    device size with M = 1024*1024:      476940 MBytes
    device size with M = 1000*1000:      500107 MBytes (500 GB)
    cache/buffer size  = 8192 KBytes
    Form Factor: 2.5 inch
Capabilities:
    LBA, IORDY(can be disabled)
    Queue depth: 32
    Standby timer values: spec'd by Standard, no device specific minimum
    R/W multiple sector transfer: Max = 16  Current = ?
    Advanced power management level: disabled
    Recommended acoustic management value: 254, current value: 0
    DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
         Cycle time: min=120ns recommended=120ns
    PIO: pio0 pio1 pio2 pio3 pio4
         Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
    Enabled Supported:
       *    SMART feature set
            Security Mode feature set
       *    Power Management feature set
       *    Write cache
       *    Look-ahead
       *    Host Protected Area feature set
       *    WRITE_BUFFER command
       *    READ_BUFFER command
       *    NOP cmd
       *    DOWNLOAD_MICROCODE
            Advanced Power Management feature set
            Power-Up In Standby feature set
       *    SET_FEATURES required to spinup after power up
            SET_MAX security extension
            Automatic Acoustic Management feature set
       *    48-bit Address feature set
       *    Device Configuration Overlay feature set
       *    Mandatory FLUSH_CACHE
       *    FLUSH_CACHE_EXT
       *    SMART error logging
       *    SMART self-test
       *    General Purpose Logging feature set
       *    64-bit World wide name
       *    IDLE_IMMEDIATE with UNLOAD
       *    WRITE_UNCORRECTABLE_EXT command
       *    {READ,WRITE}_DMA_EXT_GPL commands
       *    Segmented DOWNLOAD_MICROCODE
       *    Gen1 signaling speed (1.5Gb/s)
       *    Gen2 signaling speed (3.0Gb/s)
       *    Native Command Queueing (NCQ)
       *    Host-initiated interface power management
       *    Phy event counters
       *    Idle-Unload when NCQ is active
       *    NCQ priority information
       *    DMA Setup Auto-Activate optimization
       *    Device-initiated interface power management
       *    Software settings preservation
       *    SMART Command Transport (SCT) feature set
       *    SCT Read/Write Long (AC1), obsolete
       *    SCT Write Same (AC2)
       *    SCT Error Recovery Control (AC3)
       *    SCT Features Control (AC4)
       *    SCT Data Tables (AC5)
Security:
    Master password revision code = 65534
            supported
    not     enabled
    not     locked
    not     frozen
    not     expired: security count
            supported: enhanced erase
    130min for SECURITY ERASE UNIT. 130min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50024e9400bff8ef
    NAA             : 5
    IEEE OUI        : 0024e9
    Unique ID       : 400bff8ef
Checksum: correct

[root@otoha ~]# udevadm info /sys/class/block/sda
P: /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sda
N: sda
L: 0
S: disk/by-id/wwn-0x50024e9400bff8ef
S: disk/by-path/pci-0000:00:1f.2-ata-1
S: disk/by-id/ata-SAMSUNG_HM500JI_S2NVJ56B704117
E: DEVPATH=/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sda
E: DEVNAME=/dev/sda
E: DEVTYPE=disk
E: MAJOR=8
E: MINOR=0
E: SUBSYSTEM=block
E: USEC_INITIALIZED=33973013
E: ID_ATA=1
E: ID_TYPE=disk
E: ID_BUS=ata
E: ID_MODEL=SAMSUNG_HM500JI
E: ID_MODEL_ENC=SAMSUNG\x20HM500JI\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
E: ID_REVISION=2AC101C4
E: ID_SERIAL=SAMSUNG_HM500JI_S2NVJ56B704117
E: ID_SERIAL_SHORT=S2NVJ56B704117
E: ID_ATA_WRITE_CACHE=1
E: ID_ATA_WRITE_CACHE_ENABLED=1
E: ID_ATA_FEATURE_SET_HPA=1
E: ID_ATA_FEATURE_SET_HPA_ENABLED=1
E: ID_ATA_FEATURE_SET_PM=1
E: ID_ATA_FEATURE_SET_PM_ENABLED=1
E: ID_ATA_FEATURE_SET_SECURITY=1
E: ID_ATA_FEATURE_SET_SECURITY_ENABLED=0
E: ID_ATA_FEATURE_SET_SECURITY_ERASE_UNIT_MIN=130
E: ID_ATA_FEATURE_SET_SECURITY_ENHANCED_ERASE_UNIT_MIN=130
E: ID_ATA_FEATURE_SET_SECURITY_FROZEN=1
E: ID_ATA_FEATURE_SET_SMART=1
E: ID_ATA_FEATURE_SET_SMART_ENABLED=1
E: ID_ATA_FEATURE_SET_AAM=1
E: ID_ATA_FEATURE_SET_AAM_ENABLED=0
E: ID_ATA_FEATURE_SET_AAM_VENDOR_RECOMMENDED_VALUE=254
E: ID_ATA_FEATURE_SET_AAM_CURRENT_VALUE=0
E: ID_ATA_FEATURE_SET_PUIS=1
E: ID_ATA_FEATURE_SET_PUIS_ENABLED=0
E: ID_ATA_FEATURE_SET_APM=1
E: ID_ATA_FEATURE_SET_APM_ENABLED=0
E: ID_ATA_DOWNLOAD_MICROCODE=1
E: ID_ATA_SATA=1
E: ID_ATA_SATA_SIGNAL_RATE_GEN2=1
E: ID_ATA_SATA_SIGNAL_RATE_GEN1=1
E: ID_WWN=0x50024e9400bff8ef
E: ID_WWN_WITH_EXTENSION=0x50024e9400bff8ef
E: ID_PATH=pci-0000:00:1f.2-ata-1
E: ID_PATH_TAG=pci-0000_00_1f_2-ata-1
E: ID_PART_TABLE_UUID=d3818ed3
E: ID_PART_TABLE_TYPE=dos
E: UDISKS_PRESENTATION_NOPOLICY=0
E: UDISKS_PARTITION_TABLE=1
E: UDISKS_PARTITION_TABLE_SCHEME=mbr
E: UDISKS_PARTITION_TABLE_COUNT=2
E: UDISKS_ATA_SMART_IS_AVAILABLE=1
E: DEVLINKS=/dev/disk/by-id/wwn-0x50024e9400bff8ef /dev/disk/by-path/pci-0000:00:1f.2-ata-1 /dev/disk/by-id/ata-SAMSUNG_HM500JI_S2NVJ56B704117
E: TAGS=:systemd:

[root@otoha ~]# sudo udisksctl info -d SAMSUNG_HM500JI_S2NVJ56B704117
/org/freedesktop/UDisks2/drives/SAMSUNG_HM500JI_S2NVJ56B704117:
org.freedesktop.UDisks2.Drive:
CanPowerOff:                false
Configuration:              {}
ConnectionBus:
Ejectable:                  false
Id:                         SAMSUNG-HM500JI-S2NVJ56B704117
Media:
MediaAvailable:             true
MediaChangeDetected:        true
MediaCompatibility:
MediaRemovable:             false
Model:                      SAMSUNG HM500JI
Optical:                    false
OpticalBlank:               false
OpticalNumAudioTracks:      0
OpticalNumDataTracks:       0
OpticalNumSessions:         0
OpticalNumTracks:           0
Removable:                  false
Revision:                   2AC101C4
RotationRate:               -1
Seat:                       seat0
Serial:                     S2NVJ56B704117
SiblingId:
Size:                       500107862016
SortKey:                    00coldplug/00fixed/sd____a
TimeDetected:               1584539804577748
TimeMediaDetected:          1584539804577748
Vendor:
WWN:                        0x50024e9400bff8ef
org.freedesktop.UDisks2.Drive.Ata:
AamEnabled:                                 false
AamSupported:                               true
AamVendorRecommendedValue:                  254
ApmEnabled:                                 false
ApmSupported:                               true
PmEnabled:                                  true
PmSupported:                                true
ReadLookaheadEnabled:                       true
ReadLookaheadSupported:                     true
SecurityEnhancedEraseUnitMinutes:           130
SecurityEraseUnitMinutes:                   130
SecurityFrozen:                             true
SmartEnabled:                               true
SmartFailing:                               false
SmartNumAttributesFailedInThePast:          0
SmartNumAttributesFailing:                  0
SmartNumBadSectors:                         0
SmartPowerOnSeconds:                        73742400
SmartSelftestPercentRemaining:              0
SmartSelftestStatus:                        success
SmartSupported:                             true
SmartTemperature:                           308.15000000000003
SmartUpdated:                               1584917235
WriteCacheEnabled:                          true
WriteCacheSupported:                        true

[root@otoha ~]# sudo skdump /dev/sda
Device: sat16:/dev/sda
Type: 16 Byte SCSI ATA SAT Passthru
Size: 476940 MiB
Model: [SAMSUNG HM500JI]
Serial: [S2NVJ56B704117]
Firmware: [2AC101C4]
SMART Available: yes
Quirks:
Awake: yes
SMART Disk Health Good: yes
Off-line Data Collection Status: [Off-line data collection activity was never started.]
Total Time To Complete Off-Line Data Collection: 8040 s
Self-Test Execution Status: [The previous self-test routine completed without error or no self-test has ever been run.]
Percent Self-Test Remaining: 0%
Conveyance Self-Test Available: no
Short/Extended Self-Test Available: yes
Start Self-Test Available: yes
Abort Self-Test Available: yes
Short Self-Test Polling Time: 2 min
Extended Self-Test Polling Time: 134 min
Conveyance Self-Test Polling Time: 0 min
Bad Sectors: 0 sectors
Powered On: 2.3 years
Power Cycles: 3371
Average Powered On Per Power Cycle: 6.1 h
Temperature: 34.0 C
Attribute Parsing Verification: Good
Overall Status: GOOD
ID# Name                        Value Worst Thres Pretty      Raw            Type    Updates Good Good/Past
  1 raw-read-error-rate         100   100    51   2           0x020000000000 prefail online  yes  yes
  2 throughput-performance      252   252     0   n/a         0x000000000000 old-age online  n/a  n/a
  3 spin-up-time                 91    90    25   3.0 s       0xc20b00000000 prefail online  yes  yes
  4 start-stop-count             97    97     0   3357        0x1d0d00000000 old-age online  n/a  n/a
  5 reallocated-sector-count    252   252    10   0 sectors   0x000000000000 prefail online  yes  yes
  7 seek-error-rate             252   252    51   0           0x000000000000 old-age online  yes  yes
  8 seek-time-performance       252   252    15   n/a         0x000000000000 old-age offline yes  yes
  9 power-on-hours              100   100     0   2.3 years   0x115000000000 old-age online  n/a  n/a
 10 spin-retry-count            252   252    51   0           0x000000000000 old-age online  yes  yes
 11 calibration-retry-count      99    99     0   1272        0xf80400000000 old-age online  n/a  n/a
 12 power-cycle-count            97    97     0   3371        0x2b0d00000000 old-age online  n/a  n/a
191 g-sense-error-rate          100   100     0   831         0x3f0300000000 old-age online  n/a  n/a
192 power-off-retract-count     252   252     0   0           0x000000000000 old-age online  n/a  n/a
194 temperature-celsius-2        64    56     0   34.0 C      0x22000f002c00 old-age online  n/a  n/a
195 hardware-ecc-recovered      100   100     0   0           0x000000000000 old-age online  n/a  n/a
196 reallocated-event-count     252   252     0   0           0x000000000000 old-age online  n/a  n/a
197 current-pending-sector      252   252     0   0 sectors   0x000000000000 old-age online  n/a  n/a
198 offline-uncorrectable       252   252     0   0 sectors   0x000000000000 old-age offline n/a  n/a
199 udma-crc-error-count        200   200     0   0           0x000000000000 old-age online  n/a  n/a
200 multi-zone-error-rate       100   100     0   555         0x2b0200000000 old-age online  n/a  n/a
223 load-retry-count             99    99     0   1272        0xf80400000000 old-age online  n/a  n/a
225 load-cycle-count-2            1     1     0   2257323     0xab7122000000 old-age online  n/a  n/a

[root@otoha ~]# inxi -G
Graphics:  Device-1: Intel 2nd Generation Core Processor Family Integrated Graphics driver: i915 v: kernel
           Display: x11 server: Fedora Project X.org 1.20.6 driver: i915 resolution: 1366x768~60Hz
           OpenGL: renderer: Mesa DRI Intel Sandybridge Mobile v: 3.3 Mesa 19.2.8

[root@otoha ~]# free -t
              total        used        free      shared  buff/cache   available
Mem:        8048200     1573928     2936012      426072     3538260     5742860
Swap:       8208380           0     8208380
Total:     16256580     1573928    11144392

[root@otoha ~]# df -k
Filesystem                    1K-blocks      Used Available Use% Mounted on
devtmpfs                        4005040         0   4005040   0% /dev
tmpfs                           4024100     74368   3949732   2% /dev/shm
tmpfs                           4024100      1588   4022512   1% /run
/dev/mapper/fedora_otoha-root  51343840  34031904  14674112  70% /
tmpfs                           4024100      1536   4022564   1% /tmp
/dev/mapper/fedora_otoha-home 418950048 172133744 225465088  44% /home
/dev/sda1                        999320    143800    786708  16% /boot
tmpfs                            804820       124    804696   1% /run/user/1000

[root@otoha ~]# sudo fdisk -l
Disk /dev/sda: 465.78 GiB, 500107862016 bytes, 976773168 sectors
Disk model: SAMSUNG HM500JI
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xd3818ed3

Device     Boot   Start       End   Sectors   Size Id Type
/dev/sda1  *       2048   2099199   2097152     1G 83 Linux
/dev/sda2       2099200 976773119 974673920 464.8G 8e Linux LVM

Disk /dev/mapper/fedora_otoha-root: 50 GiB, 53687091200 bytes, 104857600 sectors
Unit: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/fedora_otoha-swap: 7.85 GiB, 8405385216 bytes, 16416768 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/fedora_otoha-home: 406.95 GiB, 436937424896 bytes, 853393408 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Verificação do S.M.A.R.T Health:

 [root@otoha ~]# sudo smartctl -H  /dev/sda
 smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.20-200.fc31.x86_64] (local build)
 Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

 === START OF READ SMART DATA SECTION ===
 SMART overall-health self-assessment test result: PASSED

 [root@otoha ~]# sudo smartctl -a -d ata /dev/sda
 smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.20-200.fc31.x86_64] (local build)
 Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

 === START OF INFORMATION SECTION ===
 Model Family:     SAMSUNG SpinPoint M7
 Device Model:     SAMSUNG HM500JI
 Serial Number:    S2NVJ56B704117
 LU WWN Device Id: 5 0024e9 400bff8ef
 Firmware Version: 2AC101C4
 User Capacity:    500,107,862,016 bytes [500 GB]
 Sector Size:      512 bytes logical/physical
 Form Factor:      2.5 inches
 Device is:        In smartctl database [for details use: -P show]
 ATA Version is:   ATA8-ACS T13/1699-D revision 6
 SATA Version is:  SATA 2.6, 3.0 Gb/s
 Local Time is:    Mon Mar 23 16:49:32 2020 -03
 SMART support is: Available - device has SMART capability.
 SMART support is: Enabled

 === START OF READ SMART DATA SECTION ===
 SMART overall-health self-assessment test result: PASSED

 General SMART Values:
 Offline data collection status:     (0x00) Offline data collection activity
                                     was never started.
                                     Auto Offline Data Collection: Disabled.
 Self-test execution status:         (0)     The previous self-test routine completed
                                     without error or no self-test has ever
                                     been run.
 Total time to complete Offline
 data collection:                    (8040) seconds.
 Offline data collection
 capabilities:                       (0x5b) SMART execute Offline immediate.
                                     Auto Offline data collection on/off support.
                                     Suspend Offline collection upon new
                                     command.
                                     Offline surface scan supported.
                                     Self-test supported.
                                     No Conveyance Self-test supported.
                                     Selective Self-test supported.
 SMART capabilities:                 (0x0003) Saves SMART data before entering
                                     power-saving mode.
                                     Supports SMART auto save timer.
 Error logging capability:           (0x01) Error logging supported.
                                     General Purpose Logging supported.
 Short self-test routine
 recommended polling time:           (2) minutes.
 Extended self-test routine
 recommended polling time:           (134) minutes.
 SCT capabilities:                   (0x003f) SCT Status supported.
                                     SCT Error Recovery Control supported.
                                     SCT Feature Control supported.
                                     SCT Data Table supported.

 SMART Attributes Data Structure revision number: 16
 Vendor Specific SMART Attributes with Thresholds:
 ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
 1   Raw_Read_Error_Rate     0x002f   100   100   051    Pre-fail  Always       -       2
 2   Throughput_Performance  0x0026   252   252   000    Old_age   Always       -       0
 3   Spin_Up_Time            0x0023   091   090   025    Pre-fail  Always       -       3010
 4   Start_Stop_Count        0x0032   097   097   000    Old_age   Always       -       3357
 5   Reallocated_Sector_Ct   0x0033   252   252   010    Pre-fail  Always       -       0
 7   Seek_Error_Rate         0x002e   252   252   051    Old_age   Always       -       0
 8   Seek_Time_Performance   0x0024   252   252   015    Old_age   Offline      -       0
 9   Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       20498
 10  Spin_Retry_Count        0x0032   252   252   051    Old_age   Always       -       0
 11  Calibration_Retry_Count 0x0032   099   099   000    Old_age   Always       -       1272
 12  Power_Cycle_Count       0x0032   097   097   000    Old_age   Always       -       3371
 191 G-Sense_Error_Rate      0x0022   100   100   000    Old_age   Always       -       831
 192 Power-Off_Retract_Count 0x0022   252   252   000    Old_age   Always       -       0
 194 Temperature_Celsius     0x0002   064   056   000    Old_age   Always       -       36 (Min/Max 15/44)
 195 Hardware_ECC_Recovered  0x003a   100   100   000    Old_age   Always       -       0
 196 Reallocated_Event_Count 0x0032   252   252   000    Old_age   Always       -       0
 197 Current_Pending_Sector  0x0032   252   252   000    Old_age   Always       -       0
 198 Offline_Uncorrectable   0x0030   252   252   000    Old_age   Offline      -       0
 199 UDMA_CRC_Error_Count    0x0036   200   200   000    Old_age   Always       -       0
 200 Multi_Zone_Error_Rate   0x002a   100   100   000    Old_age   Always       -       555
 223 Load_Retry_Count        0x0032   099   099   000    Old_age   Always       -       1272
 225 Load_Cycle_Count        0x0032   001   001   000    Old_age   Always       -       2257333

 SMART Error Log Version: 1
 No Errors Logged

 SMART Self-test log structure revision number 1
 No self-tests have been logged.  [To run self-tests, use: smartctl -t]

 SMART Selective self-test log data structure revision number 0
 Note: revision number not 1 implies that no selective self-test has ever been run
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
  1        0        0  Completed [00% left] (0-65535)
  2        0        0  Not_testing
  3        0        0  Not_testing
  4        0        0  Not_testing
  5        0        0  Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.