一、作用

用于查看文件的内容 (默认只显示后10行)

二、选项

  • -n +100 从文件第100行显示至文件结尾
  • -n 从文件尾部开始显示多少行
  • -f 文件追踪 循环读取

    三、实例

    1. [root@xxxx:~ ]# tail -2 /etc/passwd
    2. lis:x:1002:1002::/home/lis:/bin/bash
    3. dockerroot:x:997:994:Docker User:/var/lib/docker:/sbin/nologin
    ```shell [root@localhost dir]# tail -n +1000 /var/log/messages ….. Jun 17 14:08:18 localhost dbus[732]: [system] Successfully activated service ‘org.freedesktop.nm_dispatcher’ Jun 17 14:08:18 localhost systemd: Started Network Manager Script Dispatcher Service. Jun 17 14:08:18 localhost nm-dispatcher: req:1 ‘dhcp4-change’ [ens40]: new request (3 scripts) Jun 17 14:08:18 localhost nm-dispatcher: req:1 ‘dhcp4-change’ [ens40]: start running ordered scripts… Jun 17 14:10:01 localhost systemd: Started Session 100 of user root.
```shell
[root@localhost dir]# tail -f  /var/log/messages 
Jun 17 14:08:18 localhost NetworkManager[738]: <info>  [1655446098.5590] dhcp4 (ens40):   domain name 'localdomain'
Jun 17 14:08:18 localhost NetworkManager[738]: <info>  [1655446098.5590] dhcp4 (ens40): state changed bound -> bound
Jun 17 14:08:18 localhost dbus[732]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Jun 17 14:08:18 localhost dhclient[35149]: bound to 192.168.137.181 -- renewal in 847 seconds.
Jun 17 14:08:18 localhost systemd: Starting Network Manager Script Dispatcher Service...
Jun 17 14:08:18 localhost dbus[732]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun 17 14:08:18 localhost systemd: Started Network Manager Script Dispatcher Service.
Jun 17 14:08:18 localhost nm-dispatcher: req:1 'dhcp4-change' [ens40]: new request (3 scripts)
Jun 17 14:08:18 localhost nm-dispatcher: req:1 'dhcp4-change' [ens40]: start running ordered scripts...
Jun 17 14:10:01 localhost systemd: Started Session 100 of user root.