Linux Unix

less : You might be familiar with ‘ cat ’. ‘less’ is a much better way to inspect large files on the command line. You’ll get a screen-fu...

A filename that begins with a period is called an invisible filename (or an invisible file or sometimes a hidden file ) because ls does no...

  --help – help -a all -c create -f forced / file read or write -i  interactively -l long display -r recursively -q quiet -v verbose

The grep (global regular expression print) utility searches through one or more files to see whether any contain a specified string of ch...

The lpr (line printer) utility places one or more files in a print queue for printing. Linux provides print queues so that only one job is...

The mv (move) utility can rename a file without making a copy of it. The mv command line specifies an existing file and a new filename us...

The cp (copy) utility makes a copy of a file. This utility can copy any file, including text and executable program (binary) files. You can...