Basic Linux Commands - Revision history

U731219879 rc at 03:51, 8 September 2019

2019-09-08T03:51:32Z

U731219879 rc at 03:49, 8 September 2019

2019-09-08T03:49:25Z

U731219879 rc at 03:48, 8 September 2019

2019-09-08T03:48:50Z

U731219879 rc at 03:45, 8 September 2019

2019-09-08T03:45:23Z

U731219879 rc at 22:53, 7 September 2019

2019-09-07T22:53:55Z

U731219879 rc at 22:50, 7 September 2019

2019-09-07T22:50:29Z

U731219879 rc at 22:42, 7 September 2019

2019-09-07T22:42:43Z

U731219879 rc at 22:10, 7 September 2019

2019-09-07T22:10:40Z

U731219879 rc at 21:49, 7 September 2019

2019-09-07T21:49:14Z

U731219879 rc: Created page with " '''Basic System Commands''' '''pwd''' Absolute Path '''mkdir''' Make directory '''rmdir''' Remove directory '''rm''' Delete file '''cp''' Copy file '..."

2019-09-07T20:57:39Z

Created page with " '''Basic System Commands''' '''pwd''' Absolute Path '''mkdir''' Make directory '''rmdir''' Remove directory '''rm''' Delete file '''cp''' Copy file '..."

New page

'''Basic System Commands'''

'''pwd''' Absolute Path
'''mkdir''' Make directory
'''rmdir''' Remove directory
'''rm''' Delete file
'''cp''' Copy file
'''touch''' - Create file.
'''touch new.txt''' - Creates new.txt file with no data
'''echo''' - Display text on Screen or Move text to file.
'''echo "Hello World"'''
'''echo my name is Rusty >> new.txt'''
'''cat''' - Display content of file.
'''cat new.txt'''
'''chmod''' - To make a file executable.
'''chmod 777 rusty.sh''' Executable and Readable.
'''history''' - Linux store any command you type in an archive file.
'''history -c''' - clear all the history
'''history -r''' - Read in the contents of the file
'''history -w''' - Overwrites the history file
'''history -d123''' - Delete line 123
'''HISTCONTROL=erasedups'''
'''head''' - Displays the beginning of a file
'''head -n 5 filename.txt''' Display the first 5 lines of file
'''head -c 5 filename.txt''' Specify the number of bytes.
'''tail''' - Displays the end of a file.
'''tail -n 10 filename.txt''' Display the last 10 lines of file
'''alias''' - This command creates an alias
'''alias cls='clear''''- Alias to clear screen
'''alias ll='ls -al''''- Alias 'ls' to change the default action of ls
'''alias rm='rm -i'''' - Alias to prevent accidental deletion
'''aspell''' - Command line Spell checker
'''aspell check sample.txt'''

Write to a file and append to it each time
'''example: Ls -al >> filename.txt'''
Write to a file and write over any previous data
'''example: Ls -al > filename.txt'''

'''User Commands and user information'''

'''Add User''' Create a new user using useradd or adduser:
'''sudo useradd -m (username) = user'''
'''sudo useradd -m (username) -G sudo = administrator'''
'''sudo adduser username'''
'''Users add Groups'''
'''sudo adduser username dialout'''
'''sudo adduser username sudo'''
'''sudo adduser username adm'''
Groups for pi - pi adm dialout cdrom sudo audio video plugdev games users input netdev spi i2c gpio lpadmin
'''groups pi''' Show groups for user pi
'''groups rusty''' Show groups for user rusty
'''Remove Groups'''
'''sudo deluser rusty adm''' - Removes rusty from adm group.
'''Remove User''' Delete a user
'''sudo userdel rusty''' - Delete user rusty
'''sudo rm -rf /home/rusty''' - Remove the home directory of the user
'''sudo userdel -r rusty''' - Delete user rusty and home folder.
'''tail -1 /etc/passwd''' - Verify user
'''passwd''' Create/Change a user password
'''sudo passwd (username)'''
'''sudo passwd rusty'''
(Enter current) UNIX password
Enter new UNIX password
Retype new UNIX password
'''switch user'''
'''sudo /bin/su - root'''
'''su''' - Changes user to root user (password needed for root)
'''su rusty''' - Changes user to rusty (password needed for rusty)
'''last''' - Show a listing of last logged in users.
'''last -a''' - display hostnames in the last column
'''last – F''' - print full login and logout times
'''last – i''' - display IP numbers in numbers-and-dots notation
'''users''' user that are loged in
'''who''' - who is loged in and when
'''who -a''' All options
'''who -b''' Last boot
'''who -m''' From where they are loged in
'''who -q''' All users #users
'''who -r''' Runlevel
'''who --version''' Output version
'''whoami'''- print effective userid

@@ Line 21: / Line 21: @@
    '''ls -al'''  -  Allows you to view files beginning with a dot (.).
 '''tree''' - Show a directory and all subdirectories and files indented as a tree structure.
-   '''tree Documents''' Show the tree for the Documents directory.
+   '''tree Documents''' Show the tree for the '''Documents''' directory.
 '''Basic File Handles'''

@@ Line 21: / Line 21: @@
    '''ls -al'''  -  Allows you to view files beginning with a dot (.).
 '''tree''' - Show a directory and all subdirectories and files indented as a tree structure.
-   '''tree Documents''' Show the tree for the Documents director
+   '''tree Documents''' Show the tree for the Documents directory.
 '''Basic File Handles'''

@@ Line 21: / Line 21: @@
    '''ls -al'''  -  Allows you to view files beginning with a dot (.).
 '''tree''' - Show a directory and all subdirectories and files indented as a tree structure.
+  '''tree Documents''' Show the tree for the Documents director
 '''Basic File Handles'''

@@ Line 4: / Line 4: @@
 '''Basic File System Commands'''
-'''CD''' - Change Directory
+'''cd''' - Change Directory
    '''cd Documents''' - Change to Documents Directory
    '''cd home/pi''' - Change to pi Directory

@@ Line 47: / Line 47: @@
    '''chmod 777 rusty.sh''' - Makes '''rusty.sh''' Executable and Readable.
    '''chmod u+x rusty.sh''' - Add execute permission for the owner of the file '''rusty.sh'''.
+'''chown''' - Changes the user and/or group that owns a file
 '''head''' - Displays the beginning of a file
    '''head -n 5 filename.txt''' Display the first 5 lines of file

@@ Line 24: / Line 24: @@
 '''Basic File Handles'''
 '''rm''' - Remove File - Delete file
    '''rm rusty.sh''' - Deletes a file named '''rusty.sh'''
@@ Line 31: / Line 39: @@
 '''mv''' - Move File
    '''mv rusty2.txt Documents''' - Move the file named '''rusty2.txt''' to the '''Documents''' folder.
-'''touch''' - Create file.
+'''cat''' - Display content of file.
-   '''touch new.txt''' - Creates '''new.txt''' file with no data
+   '''cat new.txt'''
 '''echo''' -  Display text on Screen or Move text to file.
    '''echo "Hello World"''' - Display Hello World on screen
    '''echo My name is Rusty >> new.txt''' - Writes '''My name is Rusty''' into the file '''new.txt'''
 '''chmod''' - To make a file executable.
    '''chmod 777 rusty.sh''' - Makes '''rusty.sh''' Executable and Readable.
    '''chmod u+x rusty.sh''' - Add execute permission for the owner of the file '''rusty.sh'''.
-'''history''' - Linux store any command you type in an archive file.
 '''head''' - Displays the beginning of a file
    '''head -n 5 filename.txt''' Display the first 5 lines of file
@@ Line 109: / Line 109: @@
    '''who --version''' Output version
 '''whoami'''- print effective userid

@@ Line 17: / Line 17: @@
    '''rmdir rusty''' - Deletes a directory name rusty
    '''rmdir Documents/rusty''' - Deletes a directory named '''rusty''' in the folder '''Documents'''.
-'''rm'''  		Delete file
+'''ls''' - Lists the content of the current directory
    '''rm rusty.sh''' - Deletes a file named '''rusty.sh'''
    '''rm Documents/rusty.sh''' - Deletes a file named '''rusty.sh''' in the folder '''Documents'''.
-'''cp''' 		Copy file
+'''cp'''  - Copy-Paste Copy file
 '''touch''' - Create file.
-   '''touch new.txt''' - Creates new.txt file with no data
+   '''touch new.txt''' - Creates '''new.txt''' file with no data
    '''touch Documents/rusty.sh''' - Creates a empty file named '''rusty.sh''' in the folder '''Documents'''.
 '''echo''' -  Display text on Screen or Move text to file.
-   '''echo "Hello World"'''
+   '''echo "Hello World"''' - Display Hello World on screen
-   '''echo my name is Rusty >> new.txt'''
+   '''echo My name is Rusty >> new.txt''' - Writes '''My name is Rusty''' into the file '''new.txt'''
 '''cat''' - Display content of file.
    '''cat new.txt'''
 '''chmod''' - To make a file executable.
-   '''chmod 777 rusty.sh''' Executable and Readable.
+   '''chmod 777 rusty.sh''' - Makes '''rusty.sh''' Executable and Readable.
 '''history''' - Linux store any command you type in an archive file.
    '''history -c''' - clear all the history
@@ Line 89: / Line 96: @@
    '''su rusty''' - Changes user to rusty (password needed for rusty)
 '''last''' - Show a listing of last logged in users.
-   '''last -a''' - display hostnames in the last column
+   '''last -a''' - Display hostnames in the last column
-   '''last – F''' -  print full login and logout times
+   '''last – F''' - Print full login and logout times
-   '''last – i'''  - display IP numbers in numbers-and-dots notation
+   '''last – i'''  - Display IP numbers in numbers-and-dots notation
 '''users''' user that are loged in