centOS7下实践查询版本CPU内存硬盘容量等硬件信息

1.系统

1.1版本

uname -a 能确认是64位还是32位，其它的信息不多

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1. [root@localhost ~]# uname -a

2. Linux localhost.localdomain 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

more/etc/*release 可以看到更多信息

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1. [root@localhost ~]# more /etc/*release

2. ::::::::::::::

3. /etc/centos-release

4. ::::::::::::::

5. CentOS Linux release 7.2.1511 (Core)

6. ::::::::::::::

7. /etc/os-release

8. ::::::::::::::

9. NAME="CentOS Linux"

10. VERSION="7 (Core)"

11. ID="centos"

12. ID_LIKE="rhel fedora"

13. VERSION_ID="7"

14. PRETTY_NAME="CentOS Linux 7 (Core)"

15. ANSI_COLOR="0;31"

16. CPE_NAME="cpe:/o:centos:centos:7"

17. HOME_URL="https://www.centos.org/"

18. BUG_REPORT_URL="https://bugs.centos.org/"

19.

20. CENTOS_MANTISBT_PROJECT="CentOS-7"

21. CENTOS_MANTISBT_PROJECT_VERSION="7"

22. REDHAT_SUPPORT_PRODUCT="centos"

23. REDHAT_SUPPORT_PRODUCT_VERSION="7"

24.

25. ::::::::::::::

26. /etc/redhat-release

27. ::::::::::::::

28. CentOS Linux release 7.2.1511 (Core)

29. ::::::::::::::

30. /etc/system-release

31. ::::::::::::::

32. CentOS Linux release 7.2.1511 (Core)

1.2核数

cat /proc/cpuinfo |grep name | cut -f2 -d: | uniq -c

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1. [root@localhost ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

2. 1 Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHz

1个逻辑CPU，i5型等信息

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1. [root@localhost ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

2. 8 Intel(R) Xeon(R) CPU E7-4820 v2 @ 2.00GHz

8个逻辑CPU

cat /proc/cpuinfo | grepphysical | uniq -c

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1. [root@localhost ~]# cat /proc/cpuinfo | grep physical | uniq -c

2. 1 physical id : 0

3. 1 address sizes : 42 bits physical, 48 bits virtual

实际上是一颗一核的CPU

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1. [root@localhost ~]# cat /proc/cpuinfo | grep physical | uniq -c

2. 1 physical id : 0

3. 1 address sizes : 40 bits physical, 48 bits virtual

4. 1 physical id : 0

5. 1 address sizes : 40 bits physical, 48 bits virtual

6. 1 physical id : 0

7. 1 address sizes : 40 bits physical, 48 bits virtual

8. 1 physical id : 0

9. 1 address sizes : 40 bits physical, 48 bits virtual

10. 1 physical id : 0

11. 1 address sizes : 40 bits physical, 48 bits virtual

12. 1 physical id : 0

13. 1 address sizes : 40 bits physical, 48 bits virtual

14. 1 physical id : 0

15. 1 address sizes : 40 bits physical, 48 bits virtual

16. 1 physical id : 0

17. 1 address sizes : 40 bits physical, 48 bits virtual

由8个1核的CPU组成8核

cat /proc/cpuinfo可以看到更为详细的信息

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1. [root@localhost ~]# cat /proc/cpuinfo

2. processor : 0

3. vendor_id : GenuineIntel

4. cpu family : 6

5. model : 94

6. model name : Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHz

7. stepping : 3

8. microcode : 0x74

9. cpu MHz : 2304.004

10. cache size : 6144 KB

11. physical id : 0

12. siblings : 1

13. core id : 0

14. cpu cores : 1

15. apicid : 0

16. initial apicid : 0

17. fpu : yes

18. fpu_exception : yes

19. cpuid level : 22

20. wp : yes

21. flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ida arat epb pln pts dtherm hwp hwp_noitfy hwp_act_window hwp_epp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 invpcid rtm rdseed adx smap xsaveopt xsavec xgetbv1 xsaves

22. bogomips : 4608.00

23. clflush size : 64

24. cache_alignment : 64

25. address sizes : 42 bits physical, 48 bits virtual

26. power management:

1.3运行模式

getconf LONG_BIT CPU运行在多少位模式下

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1. [root@localhost ~]# getconf LONG_BIT

2. 64

如果是32，说明当前CPU运行在32bit模式下, 但不代表CPU不支持64bit

cat /proc/cpuinfo | grep flags | grep 'lm ' | wc -l 是否支持64位

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1. [root@localhost ~]# cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l

2. 1

结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit

1.4计算机名

hostname

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1. [root@localhost ~]# hostname

2. localhost.localdomain

1.5.查看环境变量

env

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1. [root@localhost ~]# env

2. XDG_SESSION_ID=4

3. HOSTNAME=localhost.localdomain

4. SELINUX_ROLE_REQUESTED=

5. TERM=vt100

6. SHELL=/bin/bash

7. HISTSIZE=1000

8. SSH_CLIENT=192.168.174.1 58896 22

9. SELINUX_USE_CURRENT_RANGE=

10. SSH_TTY=/dev/pts/0

11. USER=root

1.6系统运行多长时间了/负载数

uptime

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1. [root@localhost proc]# uptime

2. 10:55:01 up 1:28, 2 users, load average: 0.00, 0.01, 0.05

1.当前时间10:55:01

2.系统运行了多少时间,1:28（1小时28分)

3.多少个用户,2 users

4.平均负载：0.00, 0.01, 0.05，最近1分钟、5分钟、15分钟系统的负载

直接查看平均负载情况 cat /proc/loadavg

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1. [root@localhost proc]# cat /proc/loadavg

2. 0.00 0.01 0.05 4/524 7152

除了前3个数字表示平均进程数量外，后面的1个分数，分母表示系统进程总数，分子表示正在运行的进程数；最后一个数字表示最近运行的进程ID

2.资源

2.1内存

cat /proc/meminfo内存的详细信息

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1. [root@localhost proc]# cat /proc/meminfo

2. MemTotal: 1001332 kB

3. MemFree: 99592 kB

4. MemAvailable: 420940 kB

5. Buffers: 1064 kB

6. Cached: 405292 kB

7. SwapCached: 0 kB

8. Active: 412548 kB

9. Inactive: 250192 kB

10. Active(anon): 205264 kB

11. Inactive(anon): 58460 kB

12. Active(file): 207284 kB

13. Inactive(file): 191732 kB

14. Unevictable: 0 kB

15. Mlocked: 0 kB

16. SwapTotal: 2097148 kB

17. SwapFree: 2097140 kB

18. Dirty: 0 kB

19. Writeback: 0 kB

20. AnonPages: 256416 kB

21. Mapped: 103344 kB

22. Shmem: 7340 kB

23. Slab: 126408 kB

24. SReclaimable: 69912 kB

25. SUnreclaim: 56496 kB

26. KernelStack: 10416 kB

27. PageTables: 15520 kB

28. NFS_Unstable: 0 kB

29. Bounce: 0 kB

30. WritebackTmp: 0 kB

31. CommitLimit: 2597812 kB

32. Committed_AS: 1578872 kB

33. VmallocTotal: 34359738367 kB

34. VmallocUsed: 170756 kB

35. VmallocChunk: 34359564288 kB

36. HardwareCorrupted: 0 kB

37. AnonHugePages: 75776 kB

38. HugePages_Total: 0

39. HugePages_Free: 0

40. HugePages_Rsvd: 0

41. HugePages_Surp: 0

42. Hugepagesize: 2048 kB

43. DirectMap4k: 73600 kB

44. DirectMap2M: 974848 kB

45. DirectMap1G: 0 kB

MemTotal总内存，MemFree可用内存
free -m(-m，单位是m，如果是-g，单位是g）查看可用内存

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1. [root@localhost proc]# free -m

2. total used free shared buff/cache available

3. Mem: 977 360 97 7 520 411

4. Swap: 2047 0 2047

空闲内存total-used=free+buff/cache

我们通过free命令查看机器空闲内存时，会发现free的值很小。这主要是因为，在linux中有这么一种思想，内存不用白不用，因此它尽可能的cache和buffer一些数据，以方便下次使用。但实际上这些内存也是可以立刻拿来使用的。

3.磁盘和分区

3.1查看各分区使用情况

df -h

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1. [root@localhost ~]# df -h

2. Filesystem Size Used Avail Use% Mounted on

3. /dev/mapper/centos-root 45G 22G 24G 48% /

4. devtmpfs 906M 0 906M 0% /dev

5. tmpfs 921M 96K 921M 1% /dev/shm

6. tmpfs 921M 1004K 920M 1% /run

7. tmpfs 921M 0 921M 0% /sys/fs/cgroup

8. /dev/sda1 497M 195M 303M 40% /boot

9. tmpfs 185M 0 185M 0% /run/user/1001

10. tmpfs 185M 0 185M 0% /run/user/0

11. [root@localhost ~]#

3.2查看指定目录的大小

du -sh <目录名>

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1. [root@localhost ~]# du -sh /root

2. 1.2G /root

3.3查看所有分区

fdisk -l

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1. [root@localhost proc]# fdisk -l

3. 磁盘 /dev/sda：32.2 GB, 32212254720 字节，62914560 个扇区

4. Units = 扇区 of 1 * 512 = 512 bytes

5. 扇区大小(逻辑/物理)：512 字节 / 512 字节

6. I/O 大小(最小/最佳)：512 字节 / 512 字节

7. 磁盘标签类型：dos

8. 磁盘标识符：0x000a0cd4

10. 设备 Boot Start End Blocks Id System

11. /dev/sda1 * 2048 1026047 512000 83 Linux

12. /dev/sda2 1026048 62914559 30944256 8e Linux LVM

13.

14. 磁盘 /dev/mapper/centos-root：29.5 GB, 29490151424 字节，57597952 个扇区

15. Units = 扇区 of 1 * 512 = 512 bytes

16. 扇区大小(逻辑/物理)：512 字节 / 512 字节

17. I/O 大小(最小/最佳)：512 字节 / 512 字节

18.

19.

20. 磁盘 /dev/mapper/centos-swap：2147 MB, 2147483648 字节，4194304 个扇区

21. Units = 扇区 of 1 * 512 = 512 bytes

22. 扇区大小(逻辑/物理)：512 字节 / 512 字节

23. I/O 大小(最小/最佳)：512 字节 / 512 字节

24.

25.

26. 磁盘 /dev/mapper/centos-docker--poolmeta：33 MB, 33554432 字节，65536 个扇区

27. Units = 扇区 of 1 * 512 = 512 bytes

28. 扇区大小(逻辑/物理)：512 字节 / 512 字节

29. I/O 大小(最小/最佳)：512 字节 / 512 字节

30.

31.

32. 磁盘 /dev/mapper/docker-253:0-101330881-pool：107.4 GB, 107374182400 字节，209715200 个扇区

33. Units = 扇区 of 1 * 512 = 512 bytes

34. 扇区大小(逻辑/物理)：512 字节 / 512 字节

35. I/O 大小(最小/最佳)：65536 字节 / 65536 字节

3.4查看所有交换分区

swapon -s

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1. [root@localhost proc]# swapon -s

2. 文件名类型大小已用权限

3. /dev/dm-1 partition 2097148 8 -1

4.网络

4.1查看所有网络接口的属性

ifconfig

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1. [root@localhost proc]# ifconfig

2. docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500

3. inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0

4. ether 02:42:e1:b8:a5:4f txqueuelen 0 (Ethernet)

5. RX packets 0 bytes 0 (0.0 B)

6. RX errors 0 dropped 0 overruns 0 frame 0

7. TX packets 0 bytes 0 (0.0 B)

8. TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

10. eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

11. inet 192.168.174.129 netmask 255.255.255.0 broadcast 192.168.174.255

12. inet6 fe80::20c:29ff:fe50:b3b4 prefixlen 64 scopeid 0x20<link>

13. ether 00:0c:29:50:b3:b4 txqueuelen 1000 (Ethernet)

14. RX packets 28649 bytes 38411280 (36.6 MiB)

15. RX errors 0 dropped 0 overruns 0 frame 0

16. TX packets 8937 bytes 1226914 (1.1 MiB)

17. TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

18.

19. lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536

20. inet 127.0.0.1 netmask 255.0.0.0

21. inet6 ::1 prefixlen 128 scopeid 0x10<host>

22. loop txqueuelen 0 (Local Loopback)

23. RX packets 4 bytes 340 (340.0 B)

24. RX errors 0 dropped 0 overruns 0 frame 0

25. TX packets 4 bytes 340 (340.0 B)

26. TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

27.

28. virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500

29. inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255

30. ether 00:00:00:00:00:00 txqueuelen 0 (Ethernet)

31. RX packets 0 bytes 0 (0.0 B)

32. RX errors 0 dropped 0 overruns 0 frame 0

33. TX packets 0 bytes 0 (0.0 B)

34. TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

4.2 带宽

ethtool 网卡名

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1. [root@localhost php-tomcat-base]# ethtool ens192

2. Settings for ens192:

3. Supported ports: [ TP ]

4. Supported link modes: 1000baseT/Full

5. 10000baseT/Full

6. Supported pause frame use: No

7. Supports auto-negotiation: No

8. Advertised link modes: Not reported

9. Advertised pause frame use: No

10. Advertised auto-negotiation: No

11. <span style="color:#ff0000;">Speed: 10000Mb/s</span>

12. Duplex: Full

13. Port: Twisted Pair

14. PHYAD: 0

15. Transceiver: internal

16. Auto-negotiation: off

17. MDI-X: Unknown

18. Supports Wake-on: uag

19. Wake-on: d

20. Link detected: yes

看Speed

4.3查看路由表

route -n

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1. [root@localhost proc]# route -n

2. Kernel IP routing table

3. Destination Gateway Genmask Flags Metric Ref Use Iface

4. 0.0.0.0 192.168.174.2 0.0.0.0 UG 100 0 0 eth0

5. 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0

6. 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0

7. 192.168.174.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0

8. [root@localhost proc]#

4.4查看所有监听端口

netstat -lntp

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1. [root@localhost ~]# netstat -lntp

2. Active Internet connections (only servers)

3. Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

4. tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 743/rpcbind

5. tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1740/nginx: master

6. tcp 0 0 0.0.0.0:81 0.0.0.0:* LISTEN 1740/nginx: master

7. tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN 2194/dnsmasq

8. tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1543/sshd

9. tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 12610/cupsd

10. tcp 0 0 0.0.0.0:40536 0.0.0.0:* LISTEN 19964/rpc.statd

11. tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2133/master

12. tcp6 0 0 :::111 :::* LISTEN 743/rpcbind

13. tcp6 0 0 :::81 :::* LISTEN 1740/nginx: master

14. tcp6 0 0 :::22 :::* LISTEN 1543/sshd

15. tcp6 0 0 ::1:631 :::* LISTEN 12610/cupsd

16. tcp6 0 0 ::1:25 :::* LISTEN 2133/master

17. tcp6 0 0 :::35420 :::* LISTEN 19964/rpc.statd

18. [root@localhost ~]#

4.5查看所有已经建立的连接

netstat -antp

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1. [root@localhost ~]# netstat -antp

2. Active Internet connections (servers and established)

3. Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

4. tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 743/rpcbind

5. tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1740/nginx: master

6. tcp 0 0 0.0.0.0:81 0.0.0.0:* LISTEN 1740/nginx: master

7. tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN 2194/dnsmasq

8. tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1543/sshd

9. tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 12610/cupsd

10. tcp 0 0 0.0.0.0:40536 0.0.0.0:* LISTEN 19964/rpc.statd

11. tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2133/master

12. tcp 0 0 172.31.4.233:22 121.34.147.13:57190 ESTABLISHED 29540/sshd: cavan [

13. tcp 0 0 172.31.4.233:22 121.34.147.13:54544 ESTABLISHED 27077/sshd: cavan [

14. tcp 0 96 172.31.4.233:22 219.137.32.66:60645 ESTABLISHED 30315/sshd: root@pt

15. tcp 0 0 172.31.4.233:22 121.34.147.13:56319 ESTABLISHED 28703/sshd: cavan [

16. tcp6 0 0 :::111 :::* LISTEN 743/rpcbind

17. tcp6 0 0 :::81 :::* LISTEN 1740/nginx: master

18. tcp6 0 0 :::22 :::* LISTEN 1543/sshd

19. tcp6 0 0 ::1:631 :::* LISTEN 12610/cupsd

20. tcp6 0 0 ::1:25 :::* LISTEN 2133/master

21. tcp6 0 0 :::35420 :::* LISTEN 19964/rpc.statd

22. [root@localhost ~]#

4.6 某端口使用情况

lsof -i:端口号

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1. [root@localhost mysql]# lsof -i:22

2. COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME

3. sshd 1150 root 3u IPv4 18264 0t0 TCP *:ssh (LISTEN)

4. sshd 1150 root 4u IPv6 18273 0t0 TCP *:ssh (LISTEN)

5. sshd 2617 root 3u IPv4 20437 0t0 TCP localhost.localdomain:ssh->192.168.174.1:60426 (ESTABLISHED)

6. [root@localhost mysql]#

或者

netstat -apn|grep 端口号

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1. [root@localhost mysql]# netstat -apn|grep 22

2. tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1150/sshd

3. tcp 0 96 192.168.174.136:22 192.168.174.1:60426 ESTABLISHED 2617/sshd: root@pts

4. tcp6 0 0 :::22 :::* LISTEN 1150/sshd

5.进程

5.1查看所有进程

ps -ef,使用ps -ef|gerp tomcat过滤

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1. [root@localhost ~]# ps -ef

2. UID PID PPID C STIME TTY TIME CMD

3. root 1 0 0 09:26 ? 00:00:03 /usr/lib/systemd/systemd --switched-root --system --deserialize 21

4. root 2 0 0 09:26 ? 00:00:00 [kthreadd]

5. root 3 2 0 09:26 ? 00:00:00 [ksoftirqd/0]

6. root 6 2 0 09:26 ? 00:00:00 [kworker/u256:0]

7. root 7 2 0 09:26 ? 00:00:00 [migration/0]

8. root 8 2 0 09:26 ? 00:00:00 [rcu_bh]

9. root 9 2 0 09:26 ? 00:00:00 [rcuob/0]

10. root 10 2 0 09:26 ? 00:00:00 [rcuob/1]

11. root 11 2 0 09:26 ? 00:00:00 [rcuob/2]

12. root 12 2 0 09:26 ? 00:00:00 [rcuob/3]

13. root 13 2 0 09:26 ? 00:00:00 [rcuob/4]

14. root 14 2 0 09:26 ? 00:00:00 [rcuob/5]

15. root 15 2 0 09:26 ? 00:00:00 [rcuob/6]

16. root 16 2

ps -aux可以看到进程占用CPU,内存情况

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1. [root@localhost ~]# ps -aux

2. USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND

3. root 1 0.0 0.6 126124 6792 ? Ss 09:26 0:03 /usr/lib/systemd/systemd --switched-root --system --deserialize 21

4. root 2 0.0 0.0 0 0 ? S 09:26 0:00 [kthreadd]

5. root 3 0.0 0.0 0 0 ? S 09:26 0:00 [ksoftirqd/0]

6. root 6 0.0 0.0 0 0 ? S 09:26 0:00 [kworker/u256:0]

7. root 7 0.0 0.0 0 0 ? S 09:26 0:00 [migration/0]

8. root 8 0.0 0.0 0 0 ? S 09:26 0:00 [rcu_bh]

9. root 9 0.0 0.0 0 0 ? S 09:26 0:00 [rcuob/0]

10. root 10 0.

5.2实时显示进程状态

top

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1. [root@localhost ~]# top

2. top - 11:29:02 up 2:02, 2 users, load average: 0.12, 0.04, 0.05

3. Tasks: 408 total, 2 running, 406 sleeping, 0 stopped, 0 zombie

4. %Cpu(s): 1.3 us, 0.3 sy, 0.0 ni, 98.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st

5. KiB Mem : 1001332 total, 92184 free, 370332 used, 538816 buff/cache

6. KiB Swap: 2097148 total, 2097140 free, 8 used. 419124 avail Mem

8. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

9. 3001 gdm 20 0 1419364 122996 45860 S 1.0 12.3 0:06.50 gnome-shell

10. 276 root 20 0 0 0 0 S 0.3 0.0 0:09.72 kworker/0:1

11. 3765 root 20 0 142864 5128 3876 S 0.3 0.5 0:00.77 sshd

12. 7740 root 20 0 146452 2384 1432 R 0.3 0.2 0:00.17 top

13. 1 root 20 0 126124 6792 3912 S 0.0 0.7 0:03.58 systemd

14. 2 root 20 0 0 0 0 S 0.0 0.0 0:00.03 kthreadd

15. 3 root 20 0 0 0 0 S 0.0 0.0 0:00.37 ksoftirqd/0

16. 6 root 20 0 0 0 0 S 0.0 0.0 0:00.39 kworker/u256:0

17. 7 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/0

18. 8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh

19. 9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/0

20. 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/1

21. 11 root 20 0 0

6.用户

6.1查看活动用户

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1. [root@localhost ~]# w

2. 11:32:36 up 72 days, 20:50, 3 users, load average: 0.00, 0.01, 0.05

3. USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT

4. cavan pts/0 121.34.147.13 09:47 1:14m 0.17s 0.17s sshd: cavan [priv]

5. root pts/1 219.137.32.66 11:19 4.00s 0.05s 0.00s w

6. cavan pts/3 121.34.147.13 10:14 20:44 0.38s 0.11s vim Dockerfile

7. [root@localhost ~]#

6.2查看指定用户的信息

id <用户名>

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1. [root@localhost ~]# id root

2. uid=0(root) gid=0(root) groups=0(root)

3. [root@localhost ~]# id cavan

4. uid=1001(cavan) gid=1001(cavan) groups=1001(cavan)

5. [root@localhost ~]#

6.3查看用户登录日志

last

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1. [root@localhost 1]# last

2. root pts/0 192.168.174.1 Mon Oct 24 09:51 still logged in

3. (unknown :0 :0 Mon Oct 24 09:27 still logged in

4. reboot system boot 3.10.0-327.el7.x Mon Oct 24 09:26 - 11:35 (02:09)

5. root pts/0 192.168.174.1 Fri Oct 21 09:41 - 18:44 (09:03)

6. (unknown :0 :0 Fri Oct 21 09:15 - 18:44 (09:28)

7. reboot system boot 3.10.0-327.el7.x Fri Oct 21 09:15 - 11:35 (3+02:20)

8. root pts/1 192.168.174.1 Thu Oct 20 10:05 - 18:13 (08:08)

9. root pts/0

6.4查看系统所有用户

cut -d: -f1 /etc/passwd

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1. [root@localhost ~]# cut -d: -f1 /etc/passwd

2. root

3. bin

4. daemon

5. adm

6. lp

7. sync

8. shutdown

9. halt

10. mail

11. operator

12. games

13. ftp

14. nobody

15. dbus

16. polkitd

17. abrt

18. unbound

19. colord

20. usbmuxd

21. ntp

centOS7下实践查询版本CPU内存硬盘容量等硬件信息

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