查看系统资源

vmstat -刷新秒数 -刷新次数：查看系统资源

  1. [root@iZwz91sneajs2ji49vo4wxZ iep-test.ca163.com]# vmstat 1 3
  2. procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
  3.  r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
  4.  1  0      0 547804 200756 2988016    0    0    16    41   28    3  1  1 98  0  0
  5.  0  0      0 547968 200756 2988048    0    0     0     0 1055 1875  1  0 99  0  0
  6.  0  0      0 546216 200756 2988196    0    0   180     4 1410 2166  3  1 96  0  0

gmesg 或 gmesg | grep CPU：查看系统内核检测信息

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# dmesg | grep CPU
  2. [    0.000000] smpboot: Allowing 2 CPUs, 0 hotplug CPUs
  3. [    0.000000] setup_percpu: NR_CPUS:5120 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:1
  4. [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
  5. [    0.000000]     RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=2.
  6. [    0.096380] TAA: Vulnerable: Clear CPU buffers attempted, no microcode
  7. [    0.096381] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
  8. [    0.149758] smpboot: CPU0: Intel(R) Xeon(R) Platinum 8269CY CPU @ 2.50GHz (fam: 06, model: 55, stepping: 07)
  9. [    0.250901] Performance Events: unsupported p6 CPU model 85 no PMU driver, software events only.
  10. [    0.253747] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
  11. [    0.253748] TAA CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html for more details.
  12. [    0.253749] Brought up 2 CPUs
  13. [356373.065138] CPU: 0 PID: 1393 Comm: php-fpm Not tainted 3.10.0-1127.19.1.el7.x86_64 #1
  14. [356447.086440] CPU: 1 PID: 3686 Comm: RuoyiScheduler_ Not tainted 3.10.0-1127.19.1.el7.x86_64 #1

free：查看内存资源

-b：以 B 为单位显示
-k：以 KB 为单位显示，默认值
-m：以 MB 为单位显示
-g：以 GB 为单位显示

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# free
  2.               total        used        free      shared  buff/cache   available
  3. Mem:        7862344     6562544      161052       51916     1138748      969428
  4. Swap:             0           0           0
  5. [root@iZwz91sneajs2ji49vo4wxZ ~]# free -g
  6.               total        used        free      shared  buff/cache   available
  7. Mem:              7           6           0           0           1           0
  8. Swap:             0           0           0
  9. [root@iZwz91sneajs2ji49vo4wxZ ~]# free -m
  10.               total        used        free      shared  buff/cache   available
  11. Mem:           7678        6407         156          50        1114         948
  12. Swap:             0           0           0

cat /proc/cpuinfo：查看 CPU 信息

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# cat /proc/cpuinfo 
  2. processor    : 0
  3. vendor_id    : GenuineIntel
  4. cpu family    : 6
  5. model        : 85
  6. model name    : Intel(R) Xeon(R) Platinum 8269CY CPU @ 2.50GHz
  7. stepping    : 7
  8. microcode    : 0x1
  9. cpu MHz        : 2500.000
  10. cache size    : 36608 KB
  11. physical id    : 0
  12. siblings    : 2
  13. core id        : 0
  14. cpu cores    : 1
  15. apicid        : 0
  16. initial apicid    : 0
  17. fpu        : yes
  18. ...

uptime：显示系统的启动时间和平均负载

与 top 命令的第一行信息一样

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# uptime
  2.  09:32:08 up 19 days, 21:36,  1 user,  load average: 1.05, 1.07, 1.09

uname：查看系统与内核相关信息

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# uname
  2. Linux
  3. [root@iZwz91sneajs2ji49vo4wxZ ~]# uname -a
  4. Linux iZwz91sneajs2ji49vo4wxZ 3.10.0-1127.19.1.el7.x86_64 #1 SMP Tue Aug 25 17:23:54 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
  5. [root@iZwz91sneajs2ji49vo4wxZ ~]# uname -r
  6. 3.10.0-1127.19.1.el7.x86_64
  7. [root@iZwz91sneajs2ji49vo4wxZ ~]# uname -s
  8. Linux

file /bin/ls：使用 file 查看系统命令的方式查看系统位数

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# file /bin/ls
  2. /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=aaf05615b6c91d3cbb076af81aeff531c5d7dfd9, stripped

lsb_release -a：查看系统发行版本

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# lsb_release -a
  2. LSB Version:    :core-4.1-amd64:core-4.1-noarch
  3. Distributor ID:    CentOS
  4. Description:    CentOS Linux release 7.8.2003 (Core)
  5. Release:    7.8.2003
  6. Codename:    Core

lsof | more：查看系统中所有进程调用的文件

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# lsof | more
  2. COMMAND     PID   TID      USER   FD      TYPE             DEVICE   SIZE/OFF       NODE NAME
  3. systemd       1            root  cwd       DIR              253,1       4096          2 /
  4. systemd       1            root  rtd       DIR              253,1       4096          2 /
  5. systemd       1            root  txt       REG              253,1    1628544     269422 /usr/lib/systemd/systemd
  6. systemd       1            root  mem       REG              253,1      20064     272678 /usr/lib64/libuuid.so.1.
  7. 3.0
  8. systemd       1            root  mem       REG              253,1     265576     266442 /usr/lib64/libblkid.so.1
  9. .1.0
  10. systemd       1            root  mem       REG              253,1      90248     265763 /usr/lib64/libz.so.1.2.7
  11. systemd       1            root  mem       REG              253,1     157424     266444 /usr/lib64/liblzma.so.5.
  12. 2.2
  13. systemd       1            root  mem       REG              253,1      23968     266498 /usr/lib64/libcap-ng.so.
  14. 0.0.0
  15. systemd       1            root  mem       REG              253,1      19896     265924 /usr/lib64/libattr.so.1.
  16. 1.0
  17. systemd       1            root  mem       REG              253,1      19248     272662 /usr/lib64/libdl-2.17.so
  18. systemd       1            root  mem       REG              253,1     402384     265943 /usr/lib64/libpcre.so.1.
  19. 2.0

lsof /sbin/init：查询某个文件被哪个进程调用

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# lsof /sbin/init
  2. COMMAND PID USER  FD   TYPE DEVICE SIZE/OFF   NODE NAME
  3. systemd   1 root txt    REG  253,1  1628544 269422 /usr/sbin/../lib/systemd/systemd

lsof -c php：查询某个进程调用了哪些文件

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# lsof -c php | more
  2. COMMAND   PID USER   FD      TYPE             DEVICE  SIZE/OFF     NODE NAME
  3. php      1804 root  cwd       DIR              253,1      4096  4595866 /www/wwwroot/education-new-serve/public
  4. php      1804 root  rtd       DIR              253,1      4096        2 /
  5. php      1804 root  txt       REG              253,1  10836280  3419670 /www/server/php/72/bin/php
  6. php      1804 root  DEL       REG                0,4           43760275 /dev/zero
  7. php      1804 root  DEL       REG                0,4           34266732 /dev/zero
  8. php      1804 root  DEL       REG                0,4           34267215 /dev/zero
  9. php      1804 root  DEL       REG                0,4           34267214 /dev/zero
  10. php      1804 root  DEL       REG                0,4           34267212 /dev/zero
  11. php      1804 root  mem       REG              253,1   5527040  3417061 /www/server/php/72/lib/php/extensions/no
  12. -debug-non-zts-20170718/fileinfo.so
  13. php      1804 root  mem       REG              253,1    402384   265943 /usr/lib64/libpcre.so.1.2.0
  14. php      1804 root  mem       REG              253,1    155744   265960 /usr/lib64/libselinux.so.1

lsof -u root：按照用户名查询用户调用了哪些文件

  1. [root@iZwz91sneajs2ji49vo4wxZ ~]# lsof -u root | more
  2. COMMAND     PID USER   FD      TYPE             DEVICE  SIZE/OFF       NODE NAME
  3. systemd       1 root  cwd       DIR              253,1      4096          2 /
  4. systemd       1 root  rtd       DIR              253,1      4096          2 /
  5. systemd       1 root  txt       REG              253,1   1628544     269422 /usr/lib/systemd/systemd
  6. systemd       1 root  mem       REG              253,1     20064     272678 /usr/lib64/libuuid.so.1.3.0
  7. systemd       1 root  mem       REG              253,1    265576     266442 /usr/lib64/libblkid.so.1.1.0
  8. systemd       1 root  mem       REG              253,1     90248     265763 /usr/lib64/libz.so.1.2.7
  9. systemd       1 root  mem       REG              253,1    157424     266444 /usr/lib64/liblzma.so.5.2.2
  10. systemd       1 root  mem       REG              253,1     23968     266498 /usr/lib64/libcap-ng.so.0.0.0
  11. systemd       1 root  mem       REG              253,1     19896     265924 /usr/lib64/libattr.so.1.1.0
  12. systemd       1 root  mem       REG              253,1     19248     272662 /usr/lib64/libdl-2.17.so
  13. systemd       1 root  mem       REG              253,1    402384     265943 /usr/lib64/libpcre.so.1.2.0
  14. systemd       1 root  mem       REG              253,1   2156240     265442 /usr/lib64/libc-2.17.so
  15. systemd       1 root  mem       REG              253,1    142144     265469 /usr/lib64/libpthread-2.17.so