## Updated: 2010-07-06

# Highlight changing network information (rx,tx etc.)
watch -n 2 -d '/sbin/ifconfig eth0'

# Start xen guest and attach to virtual console
# to access grub and see bootup messages
xm create -c <vmname>

# Which package holds that file?
rpm -qf /bin/mount

# Which packages were installed lately?
rpm -qa --last | tac

# Get SSL certificate
openssl s_client -connect <foo.example.org>:<port>

# Replace in-file (or in-place edit) with Perl
perl -pi -e 's/oldtext/newtext/' <file>

# ldapsearch with TLS
ldapsearch -x -Z <ldapserver>

# Capturing traffic with tcpdump
tcpdump -i eth3 tcp port 389 -w /root/tcpdump.txt

# Open reverse SSH tunnel
ssh -L <localport>:<destination:port> user@gateway

# Show extended MySQL table info like collation, privileges etc.
SHOW FULL COLUMNS FROM <table>;

# Read hardware sensors from Sun server
ipmitool -v -U <username> -H <ip> sdr list all