centOS7下实践查询版本/CPU/内存/硬盘容量等硬件信息
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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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[root@localhost ~]# uname -a 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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[root@localhost ~]# more /etc/*release :::::::::::::: /etc/centos-release :::::::::::::: CentOS Linux release 7.2.1511 (Core) :::::::::::::: /etc/os-release :::::::::::::: NAME="CentOS Linux" VERSION="7 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME="CentOS Linux 7 (Core)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:7" HOME_URL="https://www.centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" CENTOS_MANTISBT_PROJECT="CentOS-7" CENTOS_MANTISBT_PROJECT_VERSION="7" REDHAT_SUPPORT_PRODUCT="centos" REDHAT_SUPPORT_PRODUCT_VERSION="7" :::::::::::::: /etc/redhat-release :::::::::::::: CentOS Linux release 7.2.1511 (Core) :::::::::::::: /etc/system-release :::::::::::::: 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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[root@localhost ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c 1 Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHz 1个逻辑CPU，i5型等信息
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[root@localhost ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c 8 Intel(R) Xeon(R) CPU E7-4820 v2 @ 2.00GHz 8个逻辑CPU
cat /proc/cpuinfo | grep physical | uniq -c
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[root@localhost ~]# cat /proc/cpuinfo | grep physical | uniq -c 1 physical id : 0 1 address sizes : 42 bits physical, 48 bits virtual 实际上是一颗一核的CPU
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[root@localhost ~]# cat /proc/cpuinfo | grep physical | uniq -c 1 physical id : 0 1 address sizes : 40 bits physical, 48 bits virtual 1 physical id : 0 1 address sizes : 40 bits physical, 48 bits virtual 1 physical id : 0 1 address sizes : 40 bits physical, 48 bits virtual 1 physical id : 0 1 address sizes : 40 bits physical, 48 bits virtual 1 physical id : 0 1 address sizes : 40 bits physical, 48 bits virtual 1 physical id : 0 1 address sizes : 40 bits physical, 48 bits virtual 1 physical id : 0 1 address sizes : 40 bits physical, 48 bits virtual 1 physical id : 0 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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[root@localhost ~]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 94 model name : Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHz stepping : 3 microcode : 0x74 cpu MHz : 2304.004 cache size : 6144 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 22 wp : yes 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 bogomips : 4608.00 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual 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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[root@localhost ~]# getconf LONG_BIT 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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[root@localhost ~]# cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l 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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[root@localhost ~]# hostname localhost.localdomain 1.5.查看环境变量
env
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[root@localhost ~]# env XDG_SESSION_ID=4 HOSTNAME=localhost.localdomain SELINUX_ROLE_REQUESTED= TERM=vt100 SHELL=/bin/bash HISTSIZE=1000 SSH_CLIENT=192.168.174.1 58896 22 SELINUX_USE_CURRENT_RANGE= SSH_TTY=/dev/pts/0 USER=root 1.6系统允许多长时间了/负载数
uptime
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[root@localhost proc]# uptime 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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[root@localhost proc]# cat /proc/loadavg 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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[root@localhost proc]# cat /proc/meminfo MemTotal: 1001332 kB MemFree: 99592 kB MemAvailable: 420940 kB Buffers: 1064 kB Cached: 405292 kB SwapCached: 0 kB Active: 412548 kB Inactive: 250192 kB Active(anon): 205264 kB Inactive(anon): 58460 kB Active(file): 207284 kB Inactive(file): 191732 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 2097148 kB SwapFree: 2097140 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 256416 kB Mapped: 103344 kB Shmem: 7340 kB Slab: 126408 kB SReclaimable: 69912 kB SUnreclaim: 56496 kB KernelStack: 10416 kB PageTables: 15520 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 2597812 kB Committed_AS: 1578872 kB VmallocTotal: 34359738367 kB VmallocUsed: 170756 kB VmallocChunk: 34359564288 kB HardwareCorrupted: 0 kB AnonHugePages: 75776 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 73600 kB DirectMap2M: 974848 kB 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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[root@localhost proc]# free -m total used free shared buff/cache available Mem: 977 360 97 7 520 411 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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[root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 45G 22G 24G 48% / devtmpfs 906M 0 906M 0% /dev tmpfs 921M 96K 921M 1% /dev/shm tmpfs 921M 1004K 920M 1% /run tmpfs 921M 0 921M 0% /sys/fs/cgroup /dev/sda1 497M 195M 303M 40% /boot tmpfs 185M 0 185M 0% /run/user/1001 tmpfs 185M 0 185M 0% /run/user/0 [root@localhost ~]# 3.2查看指定目录的大小
du -sh <目录名>
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[root@localhost ~]# du -sh /root 1.2G /root 3.3查看所有分区
fdisk -l
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[root@localhost proc]# fdisk -l 磁盘 /dev/sda：32.2 GB, 32212254720 字节，62914560 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理)：512 字节 / 512 字节 I/O 大小(最小/最佳)：512 字节 / 512 字节 磁盘标签类型：dos 磁盘标识符：0x000a0cd4 设备 Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux /dev/sda2 1026048 62914559 30944256 8e Linux LVM 磁盘 /dev/mapper/centos-root：29.5 GB, 29490151424 字节，57597952 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理)：512 字节 / 512 字节 I/O 大小(最小/最佳)：512 字节 / 512 字节 磁盘 /dev/mapper/centos-swap：2147 MB, 2147483648 字节，4194304 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理)：512 字节 / 512 字节 I/O 大小(最小/最佳)：512 字节 / 512 字节 磁盘 /dev/mapper/centos-docker--poolmeta：33 MB, 33554432 字节，65536 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理)：512 字节 / 512 字节 I/O 大小(最小/最佳)：512 字节 / 512 字节 磁盘 /dev/mapper/docker-253:0-101330881-pool：107.4 GB, 107374182400 字节，209715200 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理)：512 字节 / 512 字节 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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[root@localhost proc]# swapon -s 文件名 类型 大小 已用 权限 /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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[root@localhost proc]# ifconfig docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0 ether 02:42:e1:b8:a5:4f txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.174.129 netmask 255.255.255.0 broadcast 192.168.174.255 inet6 fe80::20c:29ff:fe50:b3b4 prefixlen 64 scopeid 0x20<link> ether 00:0c:29:50:b3:b4 txqueuelen 1000 (Ethernet) RX packets 28649 bytes 38411280 (36.6 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 8937 bytes 1226914 (1.1 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 4 bytes 340 (340.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 4 bytes 340 (340.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 00:00:00:00:00:00 txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 4.2 带宽
ethtool 网卡名
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[root@localhost php-tomcat-base]# ethtool ens192 Settings for ens192: Supported ports: [ TP ] Supported link modes: 1000baseT/Full 10000baseT/Full Supported pause frame use: No Supports auto-negotiation: No Advertised link modes: Not reported Advertised pause frame use: No Advertised auto-negotiation: No <span style="color:#ff0000;">Speed: 10000Mb/s</span> Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: off MDI-X: Unknown Supports Wake-on: uag Wake-on: d Link detected: yes 看Speed
4.3查看路由表
route -n
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[root@localhost proc]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.174.2 0.0.0.0 UG 100 0 0 eth0 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 192.168.174.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0 [root@localhost proc]# 4.4查看所有监听端口
netstat -lntp
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[root@localhost ~]# netstat -lntp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 743/rpcbind tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1740/nginx: master tcp 0 0 0.0.0.0:81 0.0.0.0:* LISTEN 1740/nginx: master tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN 2194/dnsmasq tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1543/sshd tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 12610/cupsd tcp 0 0 0.0.0.0:40536 0.0.0.0:* LISTEN 19964/rpc.statd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2133/master tcp6 0 0 :::111 :::* LISTEN 743/rpcbind tcp6 0 0 :::81 :::* LISTEN 1740/nginx: master tcp6 0 0 :::22 :::* LISTEN 1543/sshd tcp6 0 0 ::1:631 :::* LISTEN 12610/cupsd tcp6 0 0 ::1:25 :::* LISTEN 2133/master tcp6 0 0 :::35420 :::* LISTEN 19964/rpc.statd [root@localhost ~]# 4.5查看所有已经建立的连接
netstat -antp
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[root@localhost ~]# netstat -antp Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 743/rpcbind tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1740/nginx: master tcp 0 0 0.0.0.0:81 0.0.0.0:* LISTEN 1740/nginx: master tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN 2194/dnsmasq tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1543/sshd tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 12610/cupsd tcp 0 0 0.0.0.0:40536 0.0.0.0:* LISTEN 19964/rpc.statd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2133/master tcp 0 0 172.31.4.233:22 121.34.147.13:57190 ESTABLISHED 29540/sshd: cavan [ tcp 0 0 172.31.4.233:22 121.34.147.13:54544 ESTABLISHED 27077/sshd: cavan [ tcp 0 96 172.31.4.233:22 219.137.32.66:60645 ESTABLISHED 30315/sshd: root@pt tcp 0 0 172.31.4.233:22 121.34.147.13:56319 ESTABLISHED 28703/sshd: cavan [ tcp6 0 0 :::111 :::* LISTEN 743/rpcbind tcp6 0 0 :::81 :::* LISTEN 1740/nginx: master tcp6 0 0 :::22 :::* LISTEN 1543/sshd tcp6 0 0 ::1:631 :::* LISTEN 12610/cupsd tcp6 0 0 ::1:25 :::* LISTEN 2133/master tcp6 0 0 :::35420 :::* LISTEN 19964/rpc.statd [root@localhost ~]# 4.6 某端口使用情况
lsof -i:端口号
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[root@localhost mysql]# lsof -i:22 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME sshd 1150 root 3u IPv4 18264 0t0 TCP *:ssh (LISTEN) sshd 1150 root 4u IPv6 18273 0t0 TCP *:ssh (LISTEN) sshd 2617 root 3u IPv4 20437 0t0 TCP localhost.localdomain:ssh->192.168.174.1:60426 (ESTABLISHED) [root@localhost mysql]# 或者
netstat -apn|grep 端口号
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[root@localhost mysql]# netstat -apn|grep 22 tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1150/sshd tcp 0 96 192.168.174.136:22 192.168.174.1:60426 ESTABLISHED 2617/sshd: root@pts 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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[root@localhost ~]# ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 09:26 ? 00:00:03 /usr/lib/systemd/systemd --switched-root --system --deserialize 21 root 2 0 0 09:26 ? 00:00:00 [kthreadd] root 3 2 0 09:26 ? 00:00:00 [ksoftirqd/0] root 6 2 0 09:26 ? 00:00:00 [kworker/u256:0] root 7 2 0 09:26 ? 00:00:00 [migration/0] root 8 2 0 09:26 ? 00:00:00 [rcu_bh] root 9 2 0 09:26 ? 00:00:00 [rcuob/0] root 10 2 0 09:26 ? 00:00:00 [rcuob/1] root 11 2 0 09:26 ? 00:00:00 [rcuob/2] root 12 2 0 09:26 ? 00:00:00 [rcuob/3] root 13 2 0 09:26 ? 00:00:00 [rcuob/4] root 14 2 0 09:26 ? 00:00:00 [rcuob/5] root 15 2 0 09:26 ? 00:00:00 [rcuob/6] root 16 2 ps -aux可以看到进程占用CPU,内存情况
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[root@localhost ~]# ps -aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.6 126124 6792 ? Ss 09:26 0:03 /usr/lib/systemd/systemd --switched-root --system --deserialize 21 root 2 0.0 0.0 0 0 ? S 09:26 0:00 [kthreadd] root 3 0.0 0.0 0 0 ? S 09:26 0:00 [ksoftirqd/0] root 6 0.0 0.0 0 0 ? S 09:26 0:00 [kworker/u256:0] root 7 0.0 0.0 0 0 ? S 09:26 0:00 [migration/0] root 8 0.0 0.0 0 0 ? S 09:26 0:00 [rcu_bh] root 9 0.0 0.0 0 0 ? S 09:26 0:00 [rcuob/0] root 10 0. 5.2实时显示进程状态
top
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[root@localhost ~]# top top - 11:29:02 up 2:02, 2 users, load average: 0.12, 0.04, 0.05 Tasks: 408 total, 2 running, 406 sleeping, 0 stopped, 0 zombie %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 KiB Mem : 1001332 total, 92184 free, 370332 used, 538816 buff/cache KiB Swap: 2097148 total, 2097140 free, 8 used. 419124 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3001 gdm 20 0 1419364 122996 45860 S 1.0 12.3 0:06.50 gnome-shell 276 root 20 0 0 0 0 S 0.3 0.0 0:09.72 kworker/0:1 3765 root 20 0 142864 5128 3876 S 0.3 0.5 0:00.77 sshd 7740 root 20 0 146452 2384 1432 R 0.3 0.2 0:00.17 top 1 root 20 0 126124 6792 3912 S 0.0 0.7 0:03.58 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.03 kthreadd 3 root 20 0 0 0 0 S 0.0 0.0 0:00.37 ksoftirqd/0 6 root 20 0 0 0 0 S 0.0 0.0 0:00.39 kworker/u256:0 7 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh 9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/0 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/1 11 root 20 0 0 6.用户
6.1查看活动用户
w
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[root@localhost ~]# w 11:32:36 up 72 days, 20:50, 3 users, load average: 0.00, 0.01, 0.05 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT cavan pts/0 121.34.147.13 09:47 1:14m 0.17s 0.17s sshd: cavan [priv] root pts/1 219.137.32.66 11:19 4.00s 0.05s 0.00s w cavan pts/3 121.34.147.13 10:14 20:44 0.38s 0.11s vim Dockerfile [root@localhost ~]# 6.2查看指定用户的信息
id <用户名>
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[root@localhost ~]# id root uid=0(root) gid=0(root) groups=0(root) [root@localhost ~]# id cavan uid=1001(cavan) gid=1001(cavan) groups=1001(cavan) [root@localhost ~]# 6.3查看用户登录日志
last
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[root@localhost 1]# last root pts/0 192.168.174.1 Mon Oct 24 09:51 still logged in (unknown :0 :0 Mon Oct 24 09:27 still logged in reboot system boot 3.10.0-327.el7.x Mon Oct 24 09:26 - 11:35 (02:09) root pts/0 192.168.174.1 Fri Oct 21 09:41 - 18:44 (09:03) (unknown :0 :0 Fri Oct 21 09:15 - 18:44 (09:28) reboot system boot 3.10.0-327.el7.x Fri Oct 21 09:15 - 11:35 (3+02:20) root pts/1 192.168.174.1 Thu Oct 20 10:05 - 18:13 (08:08) root pts/0 6.4查看系统所有用户
cut -d: -f1 /etc/passwd
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[root@localhost ~]# cut -d: -f1 /etc/passwd root bin daemon adm lp sync shutdown halt mail operator games ftp nobody dbus polkitd abrt unbound colord usbmuxd ntp 阅读全文
0 0
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