默认显示文本文件后10行

  1. [root@kedacom log]# tail /etc/passwd
  2. tcpdump:x:72:72::/:/sbin/nologin
  3. tss:x:59:59:Account used by the trousers package to sandbox the tcsd daemon:/dev/null:/sbin/nologin
  4. uuidd:x:996:995:UUID generator helper daemon:/var/lib/libuuid:/sbin/nologin
  5. ntp:x:38:38::/etc/ntp:/sbin/nologin
  6. tomcat:x:995:994::/home/tomcat:/bin/false
  7. nginx:x:994:993:nginx user:/var/cache/nginx:/sbin/nologin
  8. es:x:1002:1002::/home/es:/bin/bash
  9. mysql:x:993:1003::/home/mysql:/bin/bash
  10. kedacom:x:1004:0::/home/kedacom:/bin/bash
  11. devupdate:x:1005:50::/var/nms/devversion:/bin/bash
  12. [root@kedacom log]#

显示后x行

tail -n x 文件名 或 tail -x 文件名

[root@kedacom log]# tail -n 2 /etc/passwd
kedacom:x:1004:0::/home/kedacom:/bin/bash
devupdate:x:1005:50::/var/nms/devversion:/bin/bash
[root@kedacom log]# tail -2 /etc/passwd
kedacom:x:1004:0::/home/kedacom:/bin/bash
devupdate:x:1005:50::/var/nms/devversion:/bin/bash

-f 一直跟踪文件

follow，文件有新的数据时，就会显示新的数据

[root@kedacom kedacom]# tail -f /var/log/tomcat/catalina.out