标签：foreign src awk 命令参数 情况下 ESS red local 动作
有时候我们会遇到需要将指定命令返回结果进行处理的情况
这种情况下，可能就需要写for循环之类的脚本进行处理了（目前我只能想到这种方法）
但是想起来还有一个xargs命令，组合这个命令就比较省事了。
场景如下：
安装Redis执行make test时，报Redis已在运行导致冲突。ps -ef查看Redis，发现还真的有十来个redis进程再跑。那就只能把其全部关闭了。一个一个kill不现实，于是研究了一下xargs命令来实现。以下是我的做法
1.首先我们需要获取到所有redis进程信息
ps -ef|grep redis |grep -v grep>/root/redispid.txt
[root@bogon ~]# cat redispid.txt root 69984 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21242 root 69992 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21272 root 69994 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21222 root 69998 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21302 root 70001 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21262 root 70006 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21252 root 70009 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21322 root 70013 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21342 root 70015 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21282 root 70016 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21352 root 70017 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21292 root 70030 1 0 23:09 pts/1 00:00:00 src/redis-server 127.0.0.1:21312 root 70875 1 0 23:10 pts/1 00:00:01 src/redis-server 127.0.0.1:21325 root 70877 1 0 23:10 pts/1 00:00:01 src/redis-server 127.0.0.1:21355 root 70894 1 0 23:10 pts/1 00:00:01 src/redis-server 127.0.0.1:21315 root 70900 1 0 23:10 pts/1 00:00:01 src/redis-server 127.0.0.1:21215 root 70954 1 0 23:10 pts/1 00:00:00 src/redis-server 127.0.0.1:21235 root 71190 1 0 23:10 pts/1 00:00:00 src/redis-server 127.0.0.1:21357 root 71211 1 0 23:10 pts/1 00:00:00 src/redis-server 127.0.0.1:21297 root 71221 1 0 23:10 pts/1 00:00:00 src/redis-server 127.0.0.1:21246 root 71448 1 0 23:10 pts/1 00:00:00 src/redis-server 127.0.0.1:21238 root 71468 1 0 23:10 pts/1 00:00:00 src/redis-server 127.0.0.1:21359 root 71843 1 0 23:11 pts/1 00:00:00 src/redis-server 127.0.0.1:21275 root 71928 1 0 23:11 pts/1 00:00:01 src/redis-server 127.0.0.1:21229 root 73476 1 0 23:18 pts/1 00:00:00 src/redis-server 127.0.0.1:21365
2.获取pid列
[root@bogon ~]# awk ‘{print $2}‘ redispid.txt 69984 69992 69994 69998 70001 70006 70009 70013 70015 70016 70017 70030 70875 70877 70894 70900 70954 71190 71211 71221 71448 71468 71843 71928 73476
3.执行kill动作。可以看到，直接kill掉了
[root@bogon ~]# awk ‘{print $2}‘ redispid.txt |xargs kill -9 [root@bogon ~]# ps -ef|grep redis root 73607 33777 0 23:27 pts/3 00:00:00 grep --color=auto redis [root@bogon ~]# netstat -tlnp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1/systemd tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1003/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 34671/master tcp 0 0 0.0.0.0:10051 0.0.0.0:* LISTEN 53270/zabbix_server tcp6 0 0 :::3306 :::* LISTEN 53233/mysqld tcp6 0 0 :::111 :::* LISTEN 1/systemd tcp6 0 0 :::80 :::* LISTEN 54805/docker-proxy tcp6 0 0 :::22 :::* LISTEN 1003/sshd tcp6 0 0 ::1:25 :::* LISTEN 34671/master tcp6 0 0 :::10051 :::* LISTEN 53270/zabbix_server [root@bogon ~]#
4.简单解释一下xargs命令
格式如下：command |xargs command 第一个command是正常命令，获取到管道后需要用到的命令参数，第二个command是个不完成的命令，第二个命令的参数是第一个命令返回的结果。而xargs则是把管道前的参数传到管道后，同时把参数里包含的换行和空白全部替换为空格。所以才会出现文本里的多行pid被顺利kill掉。整个命令就相当于kill -9 69984 69992 69994 69998 70001 70006 70009 70013 70015 70016 70017 70030 70875 70877 70894 70900 70954 71190 71211 71221 71448 71468 71843 71928 73476
标签：foreign src awk 命令参数 情况下 ESS red local 动作
原文地址：https://www.cnblogs.com/biaopei/p/11691169.html
