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open.nshare.de » Do it. Now.
Distributed parallel appliance of system settings to multiple hosts
Problem
Run stupid administrative tasks in parallel on multiple machines.
Solution
Use “parallel-ssh” (former “pssh”)!
- Get it:
aptitude install pssh
- http://www.theether.org/pssh/ (old site)
- Read about it:
Example usage
Modify setting ALLOW_SSH_ROOT_USER=without-password in /etc/rkhunter.conf on multiple machines:
#!/bin/bash cmd="perl -pi~ -e 's/ALLOW_SSH_ROOT_USER=yes/ALLOW_SSH_ROOT_USER=without-password/' /etc/rkhunter.conf" parallel-ssh --par 1 --hosts hosts-file --user root --inline $cmd < /dev/null
We had to use
--par 1, since the parallel execution of multiple ssh logins lead to some attempts being not successful. Maybe this is an issue with ssh-agent.
The issue about redirecting
STDIN to /dev/null is described here: Issue 4: pssh cannot be used from a script?