39wiki

Appearance

基础命令 ​

MIT-shell

MIT-shell_tools

TODO ​

ln ​

sh
#Creates a physical link.
ln file1 file2

#Creates a symbolic link.
- ln -s file1 file2

Basic Terminal Navigation ​

  • ls

To get the list of all the files or folders.

  • cd

Used to change the directory.

  • du

Show disk usage.

  • pwd

Show the present working directory.

  • man

Used to show the manual of any command present in Linux.

  • rmdir

It is used to delete a directory if it is empty.

  • locate

It is used to locate a file in Linux System

  • echo

This command helps us move some data, usually text into a file.

  • df

It is used to see the available disk space in each of the partitions in your system.

  • tar

Used to work with tarballs (or files compressed in a tarball archive)

File and Directory ​

  • mkdir

Used to create a directory if not already exist. It accepts the directory name as an input parameter.

  • cp

This command will copy the files and directories from the source path to the destination path. It can copy a file/directory with the new name to the destination path. It accepts the source file/directory and destination file/directory.

  • mv

Used to move the files or directories. This command’s working is almost similar to cp command but it deletes a copy of the file or directory from the source path. - Move multiple files

sh
mv a.py b.py c.py Dir
mv a b c -t Dir
  • rm

Used to remove files or directories.

File Permissions ​

  • chown

Used to change the owner of the file.

  • chgrp

Used to change the group owner of the file.

  • chmod

Used to modify the access/permission of a user.

sh
#+ : add a permission
#- : cancel a permission
#=: add some permissions and can other permissions(if has)
#r: read x:Executable w: write
chmod +w file.sh

Displaying the file contents ​

  • cat

It is generally used to concatenate the files. It gives the output on the standard output.

  • more

It is a filter for paging through text one screenful at a time.

  • less

It is used to viewing the files instead of opening the file.Similar to more command but it allows backward as well as forward movement.

  • head

Used to print the first N lines of a file. It accepts N as input and the default value of N is 10.

  • tail

Used to print the last N-1 lines of a file. It accepts N as input and the default value of N is 10.

Extract, sort, and filter ​

  • grep

This command is used to search for the specified text in a file.

  • grep with Regular Expressions:

Used to search for text using specific regular expressions in file.

  • sort

This command is used to sort the contents of files.

  • wc

Used to count the number of characters, words in a file.

  • cut

Used to cut a specified part of a file.

  • awk

command line数据处理

  • sed

截取文件内容，格式匹配

Last updated: