Continually monitor things

while (true); do clear; uname -n; echo ""; df -h /; echo ""; tail -5 /var/log/auth.log; echo ""; vmstat 1 5; sleep 15; done

You can use this one-liner for a quick and dirty (more customizable) alternative to the watch command. The keys to making this work: everything exists in an infinite loop; the loop starts with a clear; the loop ends with a sleep. Enter whatever you'd like to keep an eye on in the middle.

Sample Output

hostname

Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             182G   32G  141G  19% /

Aug 22 23:17:01 hostname CRON[27580]: pam_unix(cron:session): session closed for user root
Aug 22 23:25:01 hostname CRON[27584]: pam_unix(cron:session): session opened for user root by (uid=0)
Aug 22 23:25:01 hostname CRON[27584]: pam_unix(cron:session): session closed for user root
Aug 22 23:35:01 hostname CRON[27768]: pam_unix(cron:session): session opened for user root by (uid=0)
Aug 22 23:35:01 hostname CRON[27768]: pam_unix(cron:session): session closed for user root

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 0  0    428 1382640  70536 252300    0    0     7     3   10    3  0  1 99  0
 0  0    428 1382632  70536 252388    0    0     0     0  181  152  0  0 100  0
 0  0    428 1382632  70536 252388    0    0     0     0  171  129  0  0 100  0
 0  0    428 1382632  70536 252388    0    0     0     0  176  153  0  1 99  0
 0  0    428 1382632  70536 252388    0    0     0     0  163  128  0  0 100  0

By: roknir

2010-08-23 04:37:58

df echo sleep tail uname vmstat

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yeneba6574 · 27 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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