shell方式获取SSH版本
ssh -V
的输出不是标准输出,通过shell、awk、cut等方式获取版本号,无法得到想要的结果,要加上2>&1。
不加2>&1 使用awk命令:
[root@localhost ~]# ssh -V | awk -F "," '{print $1}'
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017
[root@localhost ~]#
加2>&1 使用awk命令:
[root@localhost ~]# ssh -V 2>&1 | awk -F "," '{print $1}'
OpenSSH_7.4p1
[root@localhost ~]#
============================================================================
不加2>&1 ,shell脚本:
[root@localhost ~]# vim ssh.sh
#!/usr/bin/env bash
ssh_version=$(ssh -V | awk -F "," '{print $1}')
echo "SSH Version: $ssh_version"
运行结果:
[root@localhost ~]# bash ssh.sh
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017
SSH Version:
[root@localhost ~]#
加2>&1 ,shell脚本:
#!/usr/bin/env bash
ssh_version=$(ssh -V 2>&1 | awk -F "," '{print $1}')
echo "SSH Version: $ssh_version"
运行结果:
[root@localhost ~]# bash ssh.sh
SSH Version: OpenSSH_7.4p1
[root@localhost ~]#
参考:
https://blog.csdn.net/u013107656/article/details/84567103