In Linux ‘cd’ (Change Directory) command is one of the most important and most widely used command for newbies as well as system administrators.
Change from current directory to /usr/local.
The crontab in linux runs tasks in the background at specific times; it’s like the Task Scheduler on Windows. Add tasks to your system’s crontab files using the appropriate syntax and cron will automatically run them for you.
Swap is a space on a hard drive which is used to store RAM data. Swapfile in linux is basically used to increase storage capacity of RAM. Suppose an application data is stored in RAM but currently not in use and new application need RAM space than older data in RAM is…