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I am looking to find out the last time a Solaris 9 box we are running was updated with OS patches, new software installed, etc. I need some way to prove when the last changes to the system were. I am running command line only and am not particularly familiar with Unix-like systems.

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Do you suspect that this was an automated update, or a manual update? – dotVezz Nov 5 '13 at 19:27
I don't suspect that there was any update, but I need to prove it for an audit. If there was an update it would have been manual. – D43m0n Nov 5 '13 at 19:46
up vote 1 down vote accepted

Found this for Solaris 8

ls -lrt /var/sadm/patch

Appears to show timestamps from when patch packages were applied. Also used:

ls -lrt /var/sadm/install_data/

to show timestamp of patch log.

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