tail 查看文件的尾部信息 默认后10行
[root@rstx-53 test]# tail /etc/passwd
openvpn:x:995:991:OpenVPN:/etc/openvpn:/sbin/nologin
postgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash
jenkins:x:1000:1000::/home/jenkins:/bin/bash
rpc:x:32:32:Rpcbind Daemon:/var/lib/rpcbind:/sbin/nologin
thingsboard:x:994:990:Thingsboard application:/usr/share/thingsboard:/sbin/nologin
tcpdump:x:72:72::/:/sbin/nologin
mysql:x:27:27:MariaDB Server:/var/lib/mysql:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
named:x:25:25:Named:/var/named:/sbin/nologin
yangtao:x:1001:1001::/home/yangtao:/bin/bash
tail -n numner 指定查看文件尾部的行数
[root@rstx-53 test]# tail -n 5 /etc/passwd
tcpdump:x:72:72::/:/sbin/nologin
mysql:x:27:27:MariaDB Server:/var/lib/mysql:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
named:x:25:25:Named:/var/named:/sbin/nologin
yangtao:x:1001:1001::/home/yangtao:/bin/bash
tail -f 交互式查看文件尾部信息输出信息
[root@rstx-53 test]# tail -f /var/log/messages
Feb 26 14:35:01 rstx-53 systemd: Started Session 6581 of user apache.
Feb 26 14:35:01 rstx-53 systemd: Started Session 6582 of user root.
Feb 26 14:35:01 rstx-53 systemd: Removed slice User Slice of apache.
[root@rstx-53 test]# tailf /var/log/messages
Feb 26 14:33:01 rstx-53 systemd: Started Session 6577 of user apache.
Feb 26 14:33:01 rstx-53 systemd: Removed slice User Slice of apache.
Feb 26 14:34:01 rstx-53 systemd: Created slice User Slice of apache.
Feb 26 14:34:01 rstx-53 systemd: Started Session 6579 of user apache.
Feb 26 14:34:01 rstx-53 systemd: Started Session 6580 of user root.
