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Mahbub Ferdous Bijoy
Mahbub Ferdous Bijoy

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Day-1.Linux Basic CLI(Command line interface)

  1. Present working directory(pwd): 
$ pwd
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  1. change directory(cd): 
$ cd "dirName or path"
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  1. back one step directory(cd): 
$ cd ..
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  1. back root directory(cd): 
$ cd /
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  1. from user to direct jump to the file (cd~): 
$ cd~
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  1. List file (ls): 
$ ls
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  1. List file with hidden (ls): 
$ ls -a
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  1. List file with file permission details (ls): 
$ ls -l
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  1. List file with permission and hidden files (ls): 
$ ls -al
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  1. Make directory(mkdir): 
$ mkdir "dirName"
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  1. create subdirectory at a time(mkdir): 
$ mkdir -p dirM/2ndDir/lastDir
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  1. make any file(touch): 
$ touch fileName.txt
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  1. to check description of a file(file): 
$ file fileName.jpg
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  1. show the content of a file(cat,less): 
$ cat fileName
$ less fileName
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  1. show any long file with head part or tail part(head,tail): 
$ head fileName
$ tail fileName
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  1. clear terminal (clear): 
$ clear
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  1. to see last command you write(history): 
$ history
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  1. copying file (cp): 
$ cp fileNmae pathwithFilename
$ cp *.jpg /user/desktop/picture
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  1. rename file and directory (mv): 
$ mv oldFile newFile
$ mv oldDir newDir
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  1. move file(mv): 
$ mv fileName /home/desktop/files
$ mv file1 file2 /files
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  1. remove file and directory(rm): 
$ rm fileName
$ rmdir dirName
$ rm -r dirName
$ rm *.text
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  1. know any commands manual(man): 
$ man mkdir
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  1. find some file(find): 
$ find /home -name fileName
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  1. see date and time: 
$ date 
$ time
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  1. want to see my ssh key: 
$ cat ~/.ssh/id_rsa.pub
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  1. to show a short description about your desire command(whatis): 
$ whatis cat
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  1. for exit from terminal(exit): 
$ exit 
$ logout
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  1. locate a program file from Users file using which command: 
$ which bash
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  1. who is in the system to check by using whoami command: 
$ whoami
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