What are the Linux backup file commands?

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What are the Linux backup file commands?

Linux backup file commands are:

1.tar (compression and decompression)

-c: Create a compressed archive

-x: Decompress

-t: View the contents

-r: Append files to the end of the compressed archive

-u: Update File

in the original compressed package. These five are independent commands. One of them must be used for compression and decompression. It can be used in conjunction with other commands but only one of them can be used.

The following parameters are optional when compressing or decompressing files as needed.

-z: With gzip attribute

-j: With bz2 attribute

-Z: With compress attribute

-v: Show all Process

-O: Extract the file to standard output

The following parameter -f is required

-f: Use the file name. Remember, this parameter is the last A parameter that can only be followed by the file name.

# tar -cf all.tar *.jpg

This command is to package all .jpg files into a package named all.tar. -c means generating a new package, and -f specifies the file name of the package.

# tar -rf all.tar *.gif

This command is to add all .gif files to the all.tar package. -r means adding files.

# tar -uf all.tar logo.gif

This command is to update the logo.gif file in the original tar package all.tar. -u means to update the file.

# tar -tf all.tar

This command is to list all the files in the all.tar package. -t means to list the files.

# tar -xf all.tar

This command is to extract all the files in the all.tar package. -t means unzip

Compression

tar -cvf jpg.tar *.jpg//Package all jpg files in the directory into tar.jpg

tar -czf jpg.tar.gz *.jpg //Package all jpg files in the directory into jpg.tar, compress them with gzip, and name them For jpg.tar.gz

tar -cjf jpg.tar.bz2 *.jpg //Package all jpg files in the directory into jpg.tar, and compress them with bzip2 , named jpg.tar.bz2

tar -cZf jpg.tar.Z *.jpg// After packaging all the jpg files in the directory into jpg.tar, and use compress compression, named jpg.tar.Z

rar a jpg.rar *.jpg //Rar format compression, you need to download rar for linux first

zip jpg.zip *.jpg //Zip format compression, you need to download zip for linux first

Unzip

tar -xvf file.tar //Decompress tar package

tar -xzvf file.tar.gz //Decompress tar.gz

tar -xjvf file .tar.bz2 //Extract tar.bz2

tar -xZvf file.tar.Z //Extract tar.Z

unrar e file.rar //Unzip rar

unzip file.zip //Unzip zip

Summary

1. *.tar Use tar -xvf Decompress

2, *.gz Use gzip -d or gunzip to decompress

3, *.tar.gz and *.tgz Use tar -xzf to decompress

4 , *.bz2 uses bzip2 -d or bunzip2 to decompress

5, *.tar.bz2 uses tar -xjf to decompress

6, *.Z uses uncompress to decompress

7. *.tar.Z Use tar -xZf to decompress

8. *.rar Use unrar e to decompress

9. *.zip Use unzip to decompress

Example: Compression A directory

tar -cvf compressed package name Project name

tar -cvf AppStore_180808.tar AppStore

Example: Decompress a tar package

tar -xvf compressed package name

tar -xvf AppStore_180808.tar

##2.cp (copy)

cp Copy files or directories

Syntax

cp [Options] Source file target file

Common options:

-a: Equivalent to pdr

-d: Copy the link file. The target file is also the link file or directory pointing to the source file link.

-i: When the target file already exists, you will be asked whether to overwrite it.

-p: Copy together with the attributes of the file. Commonly used for backup

-r: recursive copy, used to copy directories

-s: copied as a symbolic link file, that is, a shortcut, the link file is deleted, and the symbolic link file becomes invalid.

-l: Create a hard link link file instead of copying the file itself. The source file is deleted, but the target file remains.

Source file:

Single file or directory, use the r option to copy the directory.

Multiple files or directories. When there are multiple files or directories, the target file must be an existing directory.

Note:

When ordinary users use cp under a non-privileged user root, they need to pay attention to whether the parent directory of the source file has rx permissions. Whether the file has r permission.

When a general user uses option -a, the permission time attribute can be copied, but the user and group attributes cannot be copied.

Example:

Backup test1 file with root permission

cp -a test1 ./beifen

If you back up the directory directly, You can perform the following operations

The instructions are as follows:

cp -pdf The file to be backed up and the file after backup

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