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Linux Essentials

isecur1ty training center Presented by : Eng. Mohammad Khreesha. Linux Essentials. Table of contents. Introduction file touch rm cp mv rename. Introduction.

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Linux Essentials

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  1. isecur1ty training center Presented by : Eng. Mohammad Khreesha Linux Essentials

  2. Table of contents • Introduction • file • touch • rm • cp • mv • rename

  3. Introduction • In this chapter we learn how to recognize, create, remove, copy and move files using commands like file, touch, rm, cp, mv and rename. • Linux is case sensitive, this means that FILE1 is different from file1, and /etc/hosts is different from /etc/Hosts . • A directory is a special kind of file, but it is still a file. It will become clear that everything on Linux is a file.

  4. file • The file utility determines the file type. Linux does not use extensions to determine the file type. Your editor does not care whether a file ends in .TXT or .DOC. • The file command uses a magic file that contains patterns to recognize file types. The magic file is located in /usr/share/file/magic. Type man 5 magic for more information. • It is interesting to point out file -s for special files like those in /dev and /proc.

  5. continue….. • Examples: • file pic33.png • file /etc/passwd • file hello.c • file /proc/cpuinfo • file -s /proc/cpuinfo • file /dev/sda • file -s /dev/sda

  6. touch • Its is an easy way to create a file is with touch. • Examples: • touch file1 • touch file2 • touch file1.txt • touch file1.c

  7. rm • When you no longer need a file, use rm to remove it. • Unlike some graphical user interfaces, the command line in general does not have a waste bin or trash can to recover files. • When you use rm to remove a file, the file is gone. Therefore, be careful when removing files! • Examples: • rm file1 • rm–i file1 • rm–rf dir1

  8. cp • To copy a file, use cp with a source and a target argument. • If the target is a directory, then the source files are copied to that target directory.

  9. continue…. • Examples: • cp FileAFileB copy FileA and paste it with new name Fileb • cp FileAMyDir/  copy FileA to MyDir directory • cp -r MyDirMyDirB copy complete directories • cp file1 file2 dir1/file3 dir1/file55 dir2  cp multiple files to directory • cp -i fire water  To prevent cp from overwriting existing files (-i == interactive) • cp -p file* cpp preserve permissions and time stamps from source files

  10. mv • Use mv to rename a file or to move the file to another directory. • When you need to rename only one file then mv is the preferred command to use. • Examples: • mv file100 ABC.txt • mv file100 mydir/ • mv file100 mydir/ABC.txt

  11. The End 

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