Changing Default Values in /Etc/Ssh/Sshd_Config Using Cloud Init Config
While the Following Config Added into the Cloud_Init. Cfg File (User Data File for Building an Ubuntu16/18 Vm) Does Result in Those 2 Parameters Getting Their...
While the following config added into the cloud_init.cfg file (user data file for building an Ubuntu16/18 VM) does result in those 2 parameters getting their values increased from default 300 and 0 resp. as I want, it completely replaces the much bigger sshd_config contents that would have otherwise been placed (automatically) into /etc/ssh/sshd_config during VM deployment:
write_files:
- path: /etc/ssh/sshd_config
content: |
ClientAliveInterval 30000
ClientAliveCountMax 50
Is there perhaps a way of just getting these 2 parameter values alone changed in that config leaving the rest of it intact? Placing entire config with the 2 amended values into the cloud_init.cfg didn't work, probably because of some formatting issues. I suppose I should be looking to change those values in some sshd_config template used to create sshd_config and not directly in the latter file itself.
Many thanks in advance!
1 Answer
Apparently adding this one into /etc/ssh/sshd_config does the trick (tested, works):
runcmd:
- sed -i 's/ClientAliveInterval 300/ClientAliveInterval 30000/' /etc/ssh/sshd_config
- sed -i 's/ClientAliveCountMax 0/ClientAliveCountMax 50/' /etc/ssh/sshd_config
- service ssh restart
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