Some common linux commands that I forget

Check for dodgy logins :

cat /var/log/auth.log | grep 'Accepted password '

Get something off the NAS as nother user :

sudo su tomcat -c 'lftp admin@192.168.1.69/development/Java/blah'

Check ubuntu version

cat /etc/issue

Update

sudo apt-get update

sudo apt-get upgrade

sudo apt-get dist-upgrade

Show packages

dpkg --get-selections

Check tomcat

less /var/lib/tomcat6/logs/catalina.out