Linux shell 操作命令 tail Linux shell 命令行 让你真正开始 Linux之旅,本文描述 Linux 操作命令 tail 1、简介 tail 命令主要用于显示指定 文件末尾 内容 2、主要功能 常用查看日志文件 3、用法/命令格式 tail[选项] {文件} 4、常用参数解析
5、辅助功能 5.1 循环读取 -- 刷新显示 新内容 当前指定的文件 文件夹 有新内容写入时,新的 文本内容 将会 刷新到 标准输出中
# tail -f /var/log/syslog Sep1109:15:01 ubuntu CRON[2892]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 11) Sep 1109:15:08 ubuntu dhclient[1286]: DHCPREQUEST of 192.168.94.128on ens33 to 192.168.94.254 port 67 (xid=0x7c8e0708) Sep 1109:15:08 ubuntu dhclient[1286]: DHCPACK of 192.168.94.128 from 192.168.94.254 Sep 1109:15:08 ubuntu dhclient[1286]: bound to 192.168.94.128 -- renewal in 799 seconds. Sep 1109:17:01 ubuntu CRON[2905]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) Sep 1109:25:01 ubuntu CRON[2908]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 11) Sep 1109:28:27 ubuntu dhclient[1286]: DHCPREQUEST of 192.168.94.128on ens33 to 192.168.94.254 port 67 (xid=0x7c8e0708) Sep 1109:28:27 ubuntu dhclient[1286]: DHCPACK of 192.168.94.128 from 192.168.94.254 Sep 1109:28:27 ubuntu dhclient[1286]: bound to 192.168.94.128 -- renewal in 731 seconds. Sep 1109:30:43 ubuntu systemd[1]: Started Session 54 of user cstor. 5.2 显示 末尾字节数
# tail -c 666 /var/log/syslog 192.168.94.254 Sep11 09:15:08 ubuntu dhclient[1286]: bound to 192.168.94.128 -- renewal in 799 seconds. Sep11 09:17:01 ubuntu CRON[2905]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) Sep11 09:25:01 ubuntu CRON[2908]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) Sep11 09:28:27 ubuntu dhclient[1286]: DHCPREQUEST of 192.168.94.128 on ens33 to 192.168.94.254 port 67 (xid=0x7c8e0708) Sep11 09:28:27 ubuntu dhclient[1286]: DHCPACK of 192.168.94.128 from 192.168.94.254 Sep11 09:28:27 ubuntu dhclient[1286]: bound to 192.168.94.128 -- renewal in 731 seconds. Sep11 09:30:43 ubuntu systemd[1]: Started Session 54 of user cstor. 5.3 显示 末尾 行数
# tail -n 6 /var/log/syslog Sep1109:17:01 ubuntu CRON[2905]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) Sep 1109:25:01 ubuntu CRON[2908]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 11) Sep 1109:28:27 ubuntu dhclient[1286]: DHCPREQUEST of 192.168.94.128on ens33 to 192.168.94.254 port 67 (xid=0x7c8e0708) Sep 1109:28:27 ubuntu dhclient[1286]: DHCPACK of 192.168.94.128 from 192.168.94.254 Sep 1109:28:27 ubuntu dhclient[1286]: bound to 192.168.94.128 -- renewal in 731 seconds. Sep 11 09:30:43 ubuntu systemd[1]: Started Session 54 of user cstor. 微信公众号 欢迎 扫码 关注 ---------------------------------------------------------------------------------------------------------------------- 我们尊重原创,也注重分享,文章来源于微信公众号:石头逍遥,建议关注公众号查看原文。如若侵权请联系qter@qter.org。 ---------------------------------------------------------------------------------------------------------------------- |