Linux操作系统shell脚本for循环示例

for a in {
  
  1..3}; do ssh root@192.168.11.$a cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys; done

for a in {
  
  2..3}; do scp /root/.ssh/authorized_keys root@192.168.11$a:/root/.ssh/authorized_keys ; done

for a in {
  
  2..3}; do ssh root@node1$a echo aa > /opt/test.txt; done

/** shell脚本修改Centos7服务器的/etc/sysconfig/selinux文件，此文件需要将“SELINUX=enforcing”改成“SELINUX=disabled”为了满足防火墙配置需要 */
for a in {
  
  2..3}; do ssh root@192.168.11.$a sed -i 's/enforcing/disabled/g' /etc/sysconfig/selinux; done

/** 循环测试网络是否通不通 */
for a in {
  
  2..3}; do ping -c 6 192.168.66.$a; done