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rg-f5's avatar
rg-f5
Icon for Nimbostratus rankNimbostratus
Apr 19, 2024

F5 terminal - help to run commands - disk space full

Hello, I am learning F5 and I have searched through many of posts. I really need to under how the f5 works.    When i load up my f5 in cli - i see this  (cfg-sync In Sync) (Active) (/Common) (tmo...
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AaronJB's avatar
AaronJB
Icon for SIRT rankSIRT
Apr 26, 2024

If you're seeing the prompt you've quoted then you are currently in tmsh, rather than bash, which is why your 'df' command isn't working! Easy mistake to make if you are unfamiliar with BIG-IP architecture :)

root@(perm-vm16)(cfg-sync Standalone)(Active)(/Common)(tmos)# df -h
Syntax Error: unexpected argument "df"
root@(perm-vm16)(cfg-sync Standalone)(Active)(/Common)(tmos)# bash
[root@perm-vm16:Active:Standalone] config # df -h
Filesystem                             Size  Used Avail Use% Mounted on

 

Assuming your user account has been granted a sufficiently privileged role, simply running 'bash' in the tmsh shell will drop you to a root privilege bash shell, however if you are a lower privileged user (say, Operator role) you might simply receive an error; in this case you'll need a more privileged account:

op-test@(perm-vm16)(cfg-sync Standalone)(Active)(/Common)(tmos)# bash
Syntax Error: "bash" unexpected argument

 

  • rg-f5's avatar
    rg-f5
    Icon for Nimbostratus rankNimbostratus
    Apr 26, 2024

    hi yes i've just figured out how to use bash

     

    now i want to delete log file contents, ideally var log and free up some space, can you help AaronJB please?

    i prefer to use bash but i do not want to disrupt any services

    • AaronJB's avatar
      AaronJB
      Icon for SIRT rankSIRT
      Apr 26, 2024

      You can pretty safely delete anything in /var/log with a numerical extension like .1 or .2.gz as those are old rotated-out logfiles - if you need to delete any logs which are currently being written to then the best thing is to delete the historical logs and then force log rotation to happen (some help possibly here: https://my.f5.com/manage/s/article/K13367 )

       

      Also have a good look in the following locations for suspiciously large files - I've seen people accidentally record huge pcaps there on more than one occasion:

      /config
      /root

      Also this directory usually holds software images - they can be large and consume a lot of space on small systems:
      /shared/images

       

      Searching the entire filesystem for the largest files can also sometimes net good rewards, but it's a slow process:

      du -a / | sort -n -r | head -n 20


      HTH!