Unix/Linux Commands System Info
Date : Shows the current date and Time. Cal : Shows this month's calendar. uptime : Show current Uptime. W : Displays who is online. whoami : Displays user's information. uname -a : Show Kernal information. cat /proc/cpuinfo : Cpu information. cat /proc/meminfo : Menory information. df : Show disk usage. du : Show directory space usage. free : Show memory and Swap usage whereis app : Show possible locatins of app which app : show which app will be run by default