~/.bash_aliases

#Get current CPU frequency
alias cpu-freq='echo -n "CPU Frequency (Hz): " ; cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq'

#Get CPU temperature
alias cpu-temp='echo -n "CPU Temperature (C): " ; cat /sys/class/thermal/thermal_zone0/temp | cut -c1-2'

#Create a strong versioned SSH key with an easily identifiable comment field
alias create-ssh-key='ssh-keygen -b 8192 -o -v -C "$(whoami)@$(hostname)-$(date +"%F %T (%A %B %d %Y %Z %z)")"'

#Do a full system upgrade (depends on rpi-update)
alias do-full-upgrade='sudo rpi-update ; sudo apt-get update ; sudo apt-get dist-upgrade ; sudo apt-get autoremove ; sudo apt-get autoclean'

#Restart the secure shell service
alias restart-ssh='sudo service ssh stop ; sudo service ssh start'

#Restart WLAN service
alias restart-wlan0='sudo ip link set wlan0 down ; sudo ip link set wlan0 up'

#Extract a .tar archive with verbosity
alias untar='tar -xvzf'