Linux file management command example analysis [display, view, statistics, etc.]

This article describes the Linux file management commands with examples. Share with you for your reference, the details are as follows:

1. Display file contents

cat : Display the contents of a file
tac : Display contents in reverse order

2. Change file permissions

chmod : Change file permissions
-R recursive changes
chown: Change the file owner
-R recursive changes
chgrp: Change the group to which a file belongs
-R recursive changes

>chmod 666 1.txt
 
> chown user1 1.txt
 
>chgrp user1 1.txt

3. Link files

1) Protect the source program

2) Easy access

ln [options] source file or directory target file or directory
-s soft link
Changing one file will affect another file. Deleting the source file will affect the use of the linked file.

-d hard link

Hard-linked files look the same as normal files. Changing one file will affect the other file. When the source file is deleted, the hard-linked file will not be affected.

4. Find files

find [directory list] [matching parameters] [matching criteria]
-name Search by file name
-group Query by the group to which the file belongs
-user query by user name

> find /home/user1 -name 1.txt

5. Other related commands

df View hard disk space
-l View local hard disk
-h Display in 1024-bit
-H Display in base 1000
-T Display partition type
-t Display the specified partition type
-x does not display the specified partition type

> df -lh
 
> df -lH

du View file size
-b In bytes
-k in kilobytes
-m is in megabytes
-h Display in 1024-bit
-H Display in base 1000
-s show statistics

du -s 123 Statistics folder size

mount command

mount /dev/cdrom /mnt/cdrom

umount uninstall command

umount /mnt/cdrom

eject Eject the CD-ROM drive

I hope this article will be helpful for everyone's Linux system maintenance.