☰

SSH 命令未正确退出

tag-icon • tag-icon shell-script ssh
SSH 命令未正确退出

我编写了一个脚本，通过 SSH 循环连接到远程服务器并运行命令，它在最后一个服务器上运行后挂起。这是我的循环脚本 -

cat server | while read serName
        do
                cat cmmnds| while read line
                do
                 result=`ssh -f $serName  $line`
                 echo -n ",$result" >> test.csv
        done
echo " " >> test.csv
done

这是最后如何出错并且必须 control+C 退出

Cannot fork into background without a command to execute.
ssh: illegal option -- d

usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
           [-D [bind_address:]port] [-e escape_char] [-F configfile]
           [-I pkcs11] [-i identity_file]
           [-L [bind_address:]port:host:hostport]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-R [bind_address:]port:host:hostport] [-S ctl_path]
           [-W host:port] [-w local_tun[:remote_tun]]
           [user@]hostname [command]
Cannot fork into background without a command to execute.
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
Cannot fork into background without a command to execute.

有什么线索吗？

答案1

ssh您可能不想使用诸如 之类的工具尝试以这种方式执行此操作pssh。本 U&L 问答题为：在多个主机上执行命令，但如果成功则只打印命令？。

在您的情况下，您可以server直接将 & 命令文件放入pssh如下所示：

$ pssh -h server -i -I < commands.txt

例子

这里我构建了以下两个文件：

$ cat servers
skinner
mulder

$ cat commands.txt
date
echo 'hi'

现在当我运行它时：

$ pssh -O ForwardX11=no -h servers -i -I < commands.txt
[1] 03:10:03 [SUCCESS] skinner
Fri Jul 17 03:10:03 EDT 2015
hi
[2] 03:10:04 [SUCCESS] mulder
Fri Jul 17 03:06:41 EDT 2015
hi

您可以像这样捕获上面的输出：

$ .... | tee some_log_file.txt

或者您可以取出-i交换机并让pssh使用交换机为每个服务器创建单独的日志文件-o <dir>。

$ pssh -O ForwardX11=no -h servers -o ~/somedir -I < commands.txt
[1] 03:13:04 [SUCCESS] skinner
[2] 03:13:04 [SUCCESS] mulder

现在检查结果：

$ ls somedir/
mulder  skinner

$ cat somedir/*
Fri Jul 17 03:09:41 EDT 2015
hi
Fri Jul 17 03:13:03 EDT 2015

参考

相关内容