System Tips

system_tips.sh

# Listen which port an interface is using (wlan0, eth0, etc)
tcpdump -nettti wlan0

# List logs on real time
tail -f /var/log/*

# DNS Lookup (Query NS Records)
dig ns domain.com @8.8.8.8

# Query MX Records
dig domain.com  MX +noall +answer

# View ALL DNS Records
dig domain.com ANY +noall +answer

# View Short Output
dig domain.com ns +short

# DNS Reverse Look-up
dig -x 209.132.183.81 +short

# Get files from Server
scp -P $PORT $USER@$IP:/$FOLDER_REMOTE/* ./$FOLDER_LOCAL

# Delete files with xcode name or folder in /private directory
sudo find / -iname '*xcode*' 2> /dev/null | egrep '^/private.*' | xargs -I file sudo rm -rfv file


# This website runs a lot of interesting information http://centralops.net/co/