File Command Of Shell Script 1. Dd The dd command stands for “data duplicator” and used for copying and converting data according to the operands specified. It is very powerful low level utility of Linux which can do much more like; • Backup and restore the entire hard disk or partition. Backup of MBR (Master Boot Record) • It can copy and convert magnetic tape format, convert between ASCII and EBCDIC formats, swap bytes and can also convert lower case to upper case. • It can also be used by Linux kernel make files to make boot images. 2. DU The Linux “du” (Disk Usage) is a standard Unix/Linux command, used to check the information of disk usage of files and directories on a machine. The du command has many parameter options that can be used to get the results in many formats. The du command also displays the files and directory sizes in a recursively manner du estimates and displays the disk space used by files. -a, --all write counts for all files, not justdirect
FOR BEGINNER PROGRAMMER & COMPUTER SCIENCE STUDENTS