Linux系统资源查看

Posted 2020-08-23 Acumen

以下Linux系统资源查看命令中,较常用的为vmstat 与 lsof

• vmstat [刷新延时 刷新次数]

1 ucm@ucm-Aspire-TC-606:~$ vmstat 1 5
2 procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
3  r  b 交换 空闲 缓冲 缓存   si   so    bi    bo   in   cs us sy id wa st
4  0  0      0 4721680 294340 1586676    0    0    28    13  441  738  4  2 94  1  0
5  0  0      0 4721556 294348 1586676    0    0     0   280 1391 2388  2  0 96  1  0
6  0  0      0 4721416 294364 1586676    0    0     0   104 1410 2443  2  1 97  1  0
7  2  0      0 4721416 294364 1586716    0    0     0     0 2149 3443  2  1 97  0  0
8  0  0      0 4721416 294364 1586716    0    0     0     0 1430 2393  2  0 97  0  0
9 ucm@ucm-Aspire-TC-606:~$ 

 

• dmesg 内核自检信息

 1 ucm@ucm-Aspire-TC-606:~$ dmesg | grep CPU
 2 [    0.000000] smpboot: Allowing 6 CPUs, 0 hotplug CPUs
 3 [    0.000000] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:6 nr_node_ids:1
 4 [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=6, Nodes=1
 5 [    0.000000]     RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=6.
 6 [    0.006228] CPU: Physical Processor ID: 0
 7 [    0.006228] CPU: Processor Core ID: 0
 8 [    0.006229] mce: CPU supports 7 MCE banks
 9 [    0.167668] smpboot: CPU0: AMD FX(tm)-6300 Six-Core Processor (family: 0x15, model: 0x2, stepping: 0x0)
10 [    0.168386] NMI watchdog: enabled on all CPUs, permanently consumes one hw-PMU counter.
11 [    0.168474] .... node  #0, CPUs:      #1 #2 #3 #4 #5
12 [    0.182597] x86: Booted up 1 node, 6 CPUs
13 [    1.579348] ledtrig-cpu: registered to indicate activity on CPUs
14 [    1.580211] microcode: CPU0: patch_level=0x0600081f
15 [    1.580215] microcode: CPU1: patch_level=0x0600081f
16 [    1.580222] microcode: CPU2: patch_level=0x0600081f
17 [    1.580228] microcode: CPU3: patch_level=0x0600081f
18 [    1.580236] microcode: CPU4: patch_level=0x0600081f
19 [    1.580244] microcode: CPU5: patch_level=0x0600081f
20 ucm@ucm-Aspire-TC-606:~$ 

• free　　查看内存
• cat /proc/cpuinfo　　查看CPU信息
• uptime　　查看系统启动时间与平均负载
• uname [option]

options:

　　-a　　查看系统所有的相关信息　　

　　-r　　查看内核版本

　　-s　　查看内核名称

1 ucm@ucm-Aspire-TC-606:~$ uname -a
2 Linux ucm-Aspire-TC-606 4.8.0-28-generic #30-Ubuntu SMP Fri Nov 11 14:03:52 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
3 ucm@ucm-Aspire-TC-606:~$ uname -r
4 4.8.0-28-generic
5 ucm@ucm-Aspire-TC-606:~$ uname -s
6 Linux
7 ucm@ucm-Aspire-TC-606:~$ 

• 判断系统位数

file 外部命令,会显示该命令是多少位的命令,进而知道系统位数.

1 ucm@ucm-Aspire-TC-606:~$ file /bin/ls
2 /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=eca98eeadafddff44caf37ae3d4b227132861218, stripped
3 ucm@ucm-Aspire-TC-606:~$ 

• 系统发行版

1 ucm@ucm-Aspire-TC-606:~$ lsb_release -a
2 No LSB modules are available.
3 Distributor ID:    Ubuntu
4 Description:    Ubuntu 16.10
5 Release:    16.10
6 Codename:    yakkety
7 ucm@ucm-Aspire-TC-606:~$ 

• 列出系统打开或使用的文件信息

lsof [option]

options:

　　-c 字符串 只列出以字符串开头的进程打开的文件

　　-u 用户名 只列出某个用户的进程打开的文件

　　-p PID 列出某个PID进程打开的文件

 

eg:

查询系统中所有进程调用的文件

ucm@ucm-Aspire-TC-606:~$ lsof | more

查询某个系统文件被哪个进程调用

ucm@ucm-Aspire-TC-606:~$ lsof /sbin/init
COMMAND  PID USER  FD   TYPE DEVICE SIZE/OFF     NODE NAME
systemd 1280  ucm txt    REG    8,1  1038896 11276594 /lib/systemd/systemd
ucm@ucm-Aspire-TC-606:~$ 

查看httpd进程调用啦哪些文件

ucm@ucm-Aspire-TC-606:~$ lsof -c httpd

按照用户名,查询某个用户的进程调用的文件名

ucm@ucm-Aspire-TC-606:~$ lsof -u root