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
[root@localhost ~]# uname -aLinux 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/Linuxmore /etc/*release 可以看到更多信息
[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
[root@localhost ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c 1 Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHz1个逻辑CPU,i5型等信息
[root@localhost ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c 8 Intel(R) Xeon(R) CPU E7-4820 v2 @ 2.00GHz8个逻辑CPU
cat /proc/cpuinfo | grep physical | uniq -c
[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
[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
[root@localhost ~]# cat /proc/cpuinfoprocessor : 0vendor_id : GenuineIntelcpu family : 6model : 94model name : Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHzstepping : 3microcode : 0x74cpu MHz : 2304.004cache size : 6144 KBphysical id : 0siblings : 1core id : 0cpu cores : 1apicid : 0initial apicid : 0fpu : yesfpu_exception : yescpuid level : 22wp : yesflags : 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 xsavesbogomips : 4608.00clflush size : 64cache_alignment : 64address sizes : 42 bits physical, 48 bits virtualpower management:
1.3运行模式
getconf LONG_BIT CPU运行在多少位模式下[root@localhost ~]# getconf LONG_BIT64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
[root@localhost ~]# cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l1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
[root@localhost ~]# hostnamelocalhost.localdomain
1.5.查看环境变量
env
[root@localhost ~]# envXDG_SESSION_ID=4HOSTNAME=localhost.localdomainSELINUX_ROLE_REQUESTED=TERM=vt100SHELL=/bin/bashHISTSIZE=1000SSH_CLIENT=192.168.174.1 58896 22SELINUX_USE_CURRENT_RANGE=SSH_TTY=/dev/pts/0USER=root
1.6系统允许多长时间了/负载数
uptime
[root@localhost proc]# uptime 10:55:01 up 1:28, 2 users, load average: 0.00, 0.01, 0.051.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
[root@localhost proc]# cat /proc/loadavg0.00 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
[root@localhost proc]# cat /proc/meminfoMemTotal: 1001332 kBMemFree: 99592 kBMemAvailable: 420940 kBBuffers: 1064 kBCached: 405292 kBSwapCached: 0 kBActive: 412548 kBInactive: 250192 kBActive(anon): 205264 kBInactive(anon): 58460 kBActive(file): 207284 kBInactive(file): 191732 kBUnevictable: 0 kBMlocked: 0 kBSwapTotal: 2097148 kBSwapFree: 2097140 kBDirty: 0 kBWriteback: 0 kBAnonPages: 256416 kBMapped: 103344 kBShmem: 7340 kBSlab: 126408 kBSReclaimable: 69912 kBSUnreclaim: 56496 kBKernelStack: 10416 kBPageTables: 15520 kBNFS_Unstable: 0 kBBounce: 0 kBWritebackTmp: 0 kBCommitLimit: 2597812 kBCommitted_AS: 1578872 kBVmallocTotal: 34359738367 kBVmallocUsed: 170756 kBVmallocChunk: 34359564288 kBHardwareCorrupted: 0 kBAnonHugePages: 75776 kBHugePages_Total: 0HugePages_Free: 0HugePages_Rsvd: 0HugePages_Surp: 0Hugepagesize: 2048 kBDirectMap4k: 73600 kBDirectMap2M: 974848 kBDirectMap1G: 0 kBMemTotal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
[root@localhost proc]# free -m total used free shared buff/cache availableMem: 977 360 97 7 520 411Swap: 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
[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/centos-root 45G 22G 24G 48% /devtmpfs 906M 0 906M 0% /devtmpfs 921M 96K 921M 1% /dev/shmtmpfs 921M 1004K 920M 1% /runtmpfs 921M 0 921M 0% /sys/fs/cgroup/dev/sda1 497M 195M 303M 40% /boottmpfs 185M 0 185M 0% /run/user/1001tmpfs 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>
[root@localhost ~]# du -sh /root1.2G /root
3.3查看所有分区
fdisk -l[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[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
[root@localhost proc]# ifconfigdocker0: 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 0eth0: 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 0lo: 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 0virbr0: 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
[root@localhost php-tomcat-base]# ethtool ens192Settings 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 Speed: 10000Mb/s 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Speed4.3查看路由表
route -n
[root@localhost proc]# route -nKernel IP routing tableDestination Gateway Genmask Flags Metric Ref Use Iface0.0.0.0 192.168.174.2 0.0.0.0 UG 100 0 0 eth0172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0192.168.174.0 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[root@localhost ~]# netstat -lntpActive 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[root@localhost ~]# netstat -antpActive 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
[root@localhost mysql]# lsof -i:22COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAMEsshd 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
[root@localhost mysql]# netstat -apn|grep 22tcp 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[root@localhost ~]# ps -efUID PID PPID C STIME TTY TIME CMDroot 1 0 0 09:26 ? 00:00:03 /usr/lib/systemd/systemd --switched-root --system --deserialize 21root 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 2ps -aux可以看到进程占用CPU,内存情况
[root@localhost ~]# ps -auxUSER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMANDroot 1 0.0 0.6 126124 6792 ? Ss 09:26 0:03 /usr/lib/systemd/systemd --switched-root --system --deserialize 21root 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[root@localhost ~]# toptop - 11:29:02 up 2:02, 2 users, load average: 0.12, 0.04, 0.05Tasks: 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 stKiB Mem : 1001332 total, 92184 free, 370332 used, 538816 buff/cacheKiB 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
[root@localhost ~]# w 11:32:36 up 72 days, 20:50, 3 users, load average: 0.00, 0.01, 0.05USER TTY FROM LOGIN@ IDLE JCPU PCPU WHATcavan 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 wcavan 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>
[root@localhost ~]# id rootuid=0(root) gid=0(root) groups=0(root)[root@localhost ~]# id cavanuid=1001(cavan) gid=1001(cavan) groups=1001(cavan)[root@localhost ~]#
6.3查看用户登录日志
last
[root@localhost 1]# lastroot 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
[root@localhost ~]# cut -d: -f1 /etc/passwdrootbindaemonadmlpsyncshutdownhaltmailoperatorgamesftpnobodydbuspolkitdabrtunboundcolordusbmuxdntp
0 0
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