Linux rookie take-off road "VII" file merging, archiving, and compression

One, file merge operation
1. Overlay symbols and append symbols

A) ">" means to overwrite the contents of the left file with the contents of the right file, and create this file if the right file does not exist.

b) ">>" represents the contents of the left file appended to the right file, if the right file does not exist, create this file

2.echo echo Command

1 Echo "I am a little shame" >t.txt2echo" I am a little ruin ">>tbak.txt

3. File Merging

1 Cat File a file B > file C

4. Number of statistics file lines

1 WC -L file

5. Pipe Break

Pass the result of the left command execution to the right action

1 Command | command

Example: Count the number of rows after merging two files

cat /etc/passwdWC -L

Second, file archiving operations

Tar command

Format:-C Create a new archive

-C go to the specified directory

-v verbose display of processed files

-F Specify an archive or device

-T lists the files in the document package

-X to expand a file from a document package

Usage:

　　

1 tar -cvf the document package name. tar source file          // package 2tar -XVF Document package name.  Tar -C Specify expanded location     // unpacking　　　

Example:

1 tar -CVF test. tar /test/t.txt/test/tbak.txt/test/newtbak.txt2tar -tf test. Tar 3 tar -xvf  test.  Tar -c/test2

third, file compression operation

1.gzip and Gunzip

Gzip and Gunzip, respectively, are compression and decompression

Usage:

1 gzip files to compress 2 gunzip The compressed file to unzip

Example:

1 gzip Tbak.txt 2 gunzip tbak.txt.gz

2.BZIP2 and BUNZIP2

This format usage is exactly the same as Gzip

Example:

1 bzip2 T.txt 2 bunzip2 t.txt.bz2

Iv. File archive Compression operations

That is, when using file archiving operations, adding-Z to the format calls gzip compression

Usage:

1 tar -czvf xxx. Tar // Archive Compression 2 tar -xzvf xxx. tar. GZ / unpacking and unpacking

Example:

1 tar -czvf ww. Tar . GZ t.txt tbak.txt 2 tar -xzvf ww. tar. Gz-c/test2

Note: If you only want to package a directory under a file and not include this directory, you need to work in that directory.

Linux rookie take-off road "VII" file merging, archiving, and compression