OpenSSH : Use Parallel SSH2023/02/20 |
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Use PSSH (Parallel Secure Shell) to connect to multiple hosts via SSH.
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| [1] | Install PSSH. |
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# install from EPEL [root@dlp ~]# dnf --enablerepo=epel -y install pssh
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| [2] | Basic usage for PSSH. This is based on the environment you set SSH key-pair to target Hosts without passphrase. If set passphrase, run SSH-Agent and set passphrase on it first. |
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# specify target hosts and access via SSH [alma@dlp ~]$ pssh -H "10.0.0.51 10.0.0.52" -i "hostname" [1] 17:28:02 [SUCCESS] 10.0.0.51 node01.srv.world [2] 17:28:02 [SUCCESS] 10.0.0.52 node02.srv.world # possible to read hosts-list from a file
[alma@dlp ~]$
vi pssh_hosts.txt # write a host per line like follows alma@10.0.0.51 alma@10.0.0.52 pssh -h pssh_hosts.txt -i "uptime" [1] 19:37:59 [SUCCESS] alma@10.0.0.52 19:37:59 up 1:35, 0 users, load average: 0.00, 0.00, 0.00 [2] 19:37:59 [SUCCESS] alma@10.0.0.51 19:37:59 up 1:35, 0 users, load average: 0.00, 0.00, 0.00 |
| [3] | It's possible to connect with password authentication too, but it needs passwords on all hosts are the same one. |
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[alma@dlp ~]$ pssh -h pssh_hosts.txt -A -O PreferredAuthentications=password -i "uname -r" Warning: do not enter your password if anyone else has superuser privileges or access to your account. Password: # input password [1] 13:34:44 [SUCCESS] alma@10.0.0.51 5.14.0-34.el9.x86_64 [2] 13:34:44 [SUCCESS] alma@10.0.0.52 5.14.0-34.el9.x86_64 |
| [4] |
PSSH package includes pscp.pssh, prsync, pslurp, pnuke commands and you can use them with the same usage of pssh.
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