linux - 为文件的每一行运行脚本

Question

我正在创建一个小脚本来在节点内的所有 OpenVZ 容器上运行一些命令。

我读取了所有 OpenVZ 容器 ID，并对所有容器运行了一些命令。

在 listvz.txt 文件中我有很多 ID，该命令只在第一个上运行， 所以循环不运行...

有什么想法吗？ 谢谢!

#! /bin/bash
export PATH="/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

cat /dev/null > listvz.txt;
ls -r1 /vz/private > listvz.txt;

cat listvz.txt | while read line; do
echo FixMySQL in ${line}
vzctl exec ${line} /etc/init.d/mysql stop;
vzctl exec ${line} /etc/init.d/mysqld stop;
vzctl exec ${line} rm -rf /var/lib/mysql/mysql.sock;
vzctl exec ${line} /etc/init.d/mysql start;
vzctl exec ${line} /etc/init.d/mysqld start;
done

运行结果:

[root@ovz ~]# sh mysql-check.sh
FixMySQL in 2168
/bin/bash: /etc/init.d/mysql: No such file or directory
/bin/bash: /etc/init.d/mysqld: No such file or directory
/bin/bash: /etc/init.d/mysql: No such file or directory
/bin/bash: /etc/init.d/mysqld: No such file or directory
[root@ovz1 ~]#

只运行在CTID 2168上，但是TXT文件上的CTID多了很多...

已修复!

cat listvz.txt | while read line; do
echo FixMySQL in ${line} </dev/null
vzctl exec ${line} /etc/init.d/mysqld stop </dev/null
vzctl exec ${line} rm -rf /var/lib/mysql/mysql.sock </dev/null
vzctl exec ${line} /etc/init.d/mysqld start </dev/null
done

Answer 1

Shell 中的以下代码可以为文件的每一行运行脚本

while IFS='' read -r line || [[ -n "$line" ]]; do
   #your code
done < "input_file"