cat命令

概述
文件文本查看工具

選項
-n：給顯示的文本行編號
-E：顯示行結束符$

實例

[root@localhost ~]# cat /etc/fstab 

[root@localhost ~]# cat -n /etc/fstab 
 1  
 2  #
 3  # /etc/fstab
 4  # Created by anaconda on Mon Aug  6 17:47:50 2018
 5  #
 6  # Accessible filesystems, by reference, are maintained under '/dev/disk'
 7  # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
 8  #
 9  /dev/mapper/centos-root /                       xfs     defaults        1 1
10  UUID=bd40ba81-2c3a-4234-8057-816e098a03fd /boot                   xfs     defaults        1 2
11  /dev/mapper/centos-home /home                   xfs     defaults        1 2
12  /dev/mapper/centos-swap swap                    swap    defaults        0 0