查看一個文件夾是的掛載路徑，比如查看opt文件夾掛載在哪：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位還是32位：getconf LONG_BIT

root@iZ2zedo02x7n4nuc3lb4ueZ:~# getconf LONG_BIT
64

查看Linux當前操作系統版本信息版本：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查看版本當前操作系統發行版信息：cat /etc/issue

root@iZ2zedo02x7n4nuc3lb4ueZ:~# cat /etc/issue
 

Ubuntu 18.04 LTS \n \l

Linux日常用的命令