Linux日常用的命令

查看一个文件夹是的挂载路径，比如查看opt文件夹挂载在哪：df /opt

root@iZ2zedo02x7n4nuc3lb4ueZ:~# df /opt
Filesystem     1K-blocks    Used Available Use% Mounted on
/dev/vda1       41151808 6999740  32038640  18% /

查看linux是64位还是32位：getconf LONG_BIT

root@iZ2zedo02x7n4nuc3lb4ueZ:~# getconf LONG_BIT
64

查看Linux当前操作系统版本信息版本：cat /proc/version

root@iZ2zedo02x7n4nuc3lb4ueZ:~# cat /proc/version
Linux version 4.15.0-23-generic (buildd@lgw01-amd64-055) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #25-Ubuntu SMP Wed May 23 18:02:16 UTC 2018
root@iZ2zedo02x7n4nuc3lb4ueZ:~# 

查看Linux查看版本当前操作系统发行版信息：cat /etc/issue

root@iZ2zedo02x7n4nuc3lb4ueZ:~# cat /etc/issue
Ubuntu 18.04 LTS 
 l