Use ls -lrt /var/sadm/system/logs
procure begin.log_xxxxxx
ou finish.log_xxxxxxx
Exemplo:
ls -lrt
total de 799
lrwxrwxrwx 1 root root 20 Nov 15 2006 begin.log -> begin.log_2006_11_15
-rw-r--r-- 1 root root 90 Nov 15 2006 begin.log_2006_11_15
lrwxrwxrwx 1 root root 21 Nov 15 2006 finish.log -> finish.log_2006_11_15
O nome do symfile e o timestamp correspondem à data de instalação.