Tag: Commands

Command kill Kill command sends a signal to the process. Syntax kill id_process Options -Nsignal sends a specified signal (where Nsignal – the number or name). -l displays the number and names of signals. …

Command free free command displays the number of free and used memory in the system. Syntax free Options -b: displays the amount of memory in bytes. -k: displays the memory size in kilobytes (default). …

Command du du command displays the amount of disk space occupied by files or directories. Syntax du Options -a displays information about memory usage for all files (not only for directories). -b displays …

Command df df command displays the number of free and occupied space on all mounted filesystems systems. Syntax df Options -a displays all file systems. -i displays information about the inode if appropriate …

Command cal cal Displays a calendar for any month of any year. Syntax cal year] Options cal displays a simple calendar. If arguments are not specified, the current month is displayed. The options …

Command wc Displays the number of bytes, words and lines found in the file. Syntax wc Options -c displays only the number of bytes. -w only shows the number of words. -l displays …

Command unalias Eliminates the abbreviation as defined previously by using the alias. Syntax unalias abbreviation Description command unalias removes the abbreviation as defined previously by using the alias. Command unalias is a built-in command processor …

Command touch Changes the timestamp of file. Syntax touch files Options -c prescribes not to touch the file if it does not exist. -d time, using the specified time. -r file uses a timestamp …

Command tar tar – Creates archive files or extract files from archives. Syntax tar file_or_directory Options -c: creates a new archive. -d: compares the files from the archive files from the current directory. -r: …

Command tail Displays the last few lines of the file. Syntax tail file Options -N (where N – number) displays the last N lines. -n N (where N – number) displays the last N …