Mylinux Note---9th Day

Compression and packaging of documents

One, gzip and gunzip compression

Command format

Compression: gzip [options] [filename ... ]

Decompression: gunzip [options] [filename ... ]

Common Command Options

-D: Unzip the compressed file

-L: For each compressed document, the following information is displayed: the size of the compressed file, the size of the uncompressed file, the compression ratio, and the name of the uncompressed file

-R: Compress or decompress files in each level subdirectory under the specified directory recursively

-T: Checking the integrity of compressed files

-V: To compress and decompress each file, display file name and compression ratio

-N: Adjusts the speed of compression with the specified number, 1 or--fast for the fastest compression (low compression ratio), 9 or--best for the slowest compression ratio (high compression), and a system default of 6

Instance:

1. Compress all files in the directory

[[email protected] bbb]# ls-r.:1.txt 2.txt 3.txt ccc./ccc:1.txt 2.txt 3.txt[[email protected] bbb]# gzip-r *[[email Protected] bbb]# ls-r.:1.txt.gz 2.txt.gz 3.txt.gz ccc./ccc:1.txt.gz 2.txt.gz 3.txt.gz

2. Compress some files

[[Email protected] bbb]# gzip 2.txt 3.txt[[email protected] bbb]# ls1.txt 2.txt.gz 3.txt.gz CCC

3, view the situation of compressed files

[[email protected] bbb]# gzip -rl *          compressed        uncompressed  ratio  uncompressed_name                 649                1534   59.3% 1.txt                3072                10688  71.5% 2.txt                3680                64128  94.3% 3.txt                3680   &nbSp;           64128  94.3% ccc/3.txt                3072                10688  71.5% ccc/ 2.txt                649                 1534  59.3 % ccc/1.txt              14802               152700  90.3%   (totals)

4. Unzip the file (same effect as gzip-d)

[[email protected] bbb]# gunzip-r *[[email protected] bbb]# ls-r.:1.txt 2.txt 3.txt ccc./ccc:1.txt 2.txt 3.txt

Second, bzip2 and BUNZIP2 compression

Command format

Compression: bzip2 [options] [filename ... ]

Decompression: BUNZIP2 [options] [filename ... ]

Common Command Options

-D: Unzip

-F: When compressed or decompressed, if the file already exists, the existing file is not overwritten by default. With-F, you can force an overlay

-K: The source file is deleted by default when compressed or decompressed. With-K, the source file is preserved.

-Q: Quiet mode

-S: Reduce the amount of memory used during program execution

-T: Testing the integrity of compressed files

-V: Displays detailed information when compressing or decompressing a file

Instance

1. Compress files and keep source files

[Email protected] bbb]# bzip2-kv 1.txt 2.txt 3.txt 1.txt:2.263:1, 3.536 bits/byte, 55.80% saved, 1534 in, 678 out.  2.txt:3.413:1, 2.344 Bits/byte, 70.70% saved, 10688 in, 3132 out. 3.txt:13.878:1, 0.576 Bits/byte, 92.79% saved, 64128 in, 4621 out. [[email protected] bbb]# ls1.txt 1.txt.bz2 2.txt 2.txt.bz2 3.txt 3.txt.bz2 CCC

2. Unzip the file

[[email protected] bbb]# ls1.txt.bz2 2.txt.bz2 3.txt.bz2 ccc[[email protected] bbb]# bunzip2-v * 1.txt.bz2:done 2.t Xt.bz2:done 3.txt.bz2:donebunzip2:input file CCC is a directory. [[email protected] bbb]# ls1.txt 2.txt 3.txt CCC

Three, zip and unzip compression

Command format

Zip [parameters] [zip file name [file 1 file 2 ... ]]

Common Command Options

-M: After compressing the file, delete the source file

-Q: Quiet mode, does not show the execution of the command during compression

-R: Recursively process all subdirectories and files in the specified directory

Unzip [parameters] Zip file

Common Command Options

-L: Lists what the compressed file contains

-V: Show detailed execution procedures

Instance

1. Compress all files and directories in the specified directory

[[email protected] bbb]# ls1.txt 2.txt 3.txt ccc[[email protected] bbb]# zip-r File.zip * Adding:1.txt (deflated 59%  ) Adding:2.txt (deflated 71%) Adding:3.txt (deflated 94%) adding:ccc/(stored 0) adding:ccc/3.txt (deflated 94%) Adding:ccc/1.txt (deflated 59%) Adding:ccc/2.txt (deflated 71%) [[email protected] bbb]# ls1.txt 2.txt 3.txt CCC fi Le.zip

2. Compress some files

[[email protected] bbb]# ls1.txt 2.txt 3.txt ccc[[email protected] bbb]# zip file.zip 2.txt 3.txt adding:2.txt (defla Ted 71%) Adding:3.txt (deflated 94%) [[email protected] bbb]# ls1.txt 2.txt 3.txt CCC File.zip

3, view the situation of compressed files

[Email protected] bbb]# unzip-l file.zipArchive:file.zip Length Date time Name------------------------                      ----10688 03-25-2015 23:34 2.txt 64128 03-25-2015 23:34 3.txt----------------74816 2 files

4. Unzip the file

[Email protected] aaa]# lsbbb File.zip[[email protected] aaa]# unzip File.zipArchive:file.zip inflating:2.txt Infla Ting:3.txt[[email protected] aaa]# ls2.txt 3.txt BBB file.zip

Four, XZ compression

Command format

XZ [options] [filename ... ]

-D: Extracting Compressed files

[Email protected] bbb]# XZ file.zip 2.txt 3.txt

Unzip

[Email protected] bbb]# xz-d file.zip

V. PACKING PROCESS Tar

Command format

tar [options] tar file [directory or file]

Common options

-C: Create a new archive file

-D: Check the difference between the archive file and the specified directory

-r: Append files to the archive file

-T: List the contents of the archive file

-V: Displays information about command execution

-U: Added only if the file that needs to be appended is newer than the version of the file that already exists in the tar file

-X: Restore files or directories in an archive file

-Z: Archive files using zip compression

-j: Using bzip2 to compress archive files

Instance

1. Packaging files

[[email protected] aaa]# ls2.txt 3.txt BBB file.zip[[email protected] aaa]# TAR-CVF Fiel_2.tar bbb/bbb/bbb/3.txtbbb/fi  Le.zipbbb/ccc/bbb/ccc/3.txtbbb/ccc/1.txtbbb/ccc/2.txtbbb/1.txtbbb/2.txt[[email protected] aaa]# ls2.txt 3.txt BBB File_2.tar File.zip

2. View the contents of the archive file

[[email protected] aaa]# ls2.txt  3.txt  bbb  file_2.tar   file.zip[[email protected] aaa]# tar -tvf file_2.tardrwxr-xr-x root/root          0 2015-03-26 20:51 bbb/-rw-r--r--  root/root     64128 2015-03-25 23:34 bbb/3.txt-rw-r--r-- root/ root      7002 2015-03-26 20:51 bbb/file.zipdrwxr-xr-x root/ root         0 2015-03-25 23:11 bbb/ccc/-rw-r--r--  root/root     64128 2015-03-25 22:50 bbb/ccc/3.txt-rw-r--r--  root/root      1534 2015-03-25 22:50 bbb/ccc/1. Txt-rwxr-xr-x root/root     10688 2015-03-25 22:50 bbb/ccc/2. txt-rw-r--r-- root/root      1534 2015-03-25 23:34 bbb/1.txt-rwxr-xr-x root/root      10688 2015-03-25 23:34 bbb/2.txt[[email protected] aaa]#

3. Restore archived Files

[[email protected] aaa]# ls2.txt 3.txt BBB file_2.tar file.zip[[email protected] aaa]# RM-RF Bbb[[email protected] A aa]# ls2.txt 3.txt file_2.tar file.zip[[email protected] aaa]# TAR-XVF file_2.tarbbb/bbb/3.txtbbb/file.zipbbb/ccc/bbb/ Ccc/3.txtbbb/ccc/1.txtbbb/ccc/2.txtbbb/1.txtbbb/2.txt[[email protected] aaa]# ls2.txt 3.txt BBB File_2.tar file.zip

4. Append new files to the archive file

[[email protected] aaa]# ls2.txt  3.txt  bbb  file_2.tar   file.zip[[email protected] aaa]# tar rvf file_2.tar 2.txt2.txt[[email  protected] aaa]# tar -tvf file_2.tardrwxr-xr-x root/root          0 2015-03-26 20:51 bbb/-rw-r--r-- root/root      64128 2015-03-25 23:34 bbb/3.txt-rw-r--r-- root/root       7002 2015-03-26 20:51 bbb/file.zipdrwxr-xr-x root/root          0 2015-03-25 23:11 bbb/ccc/-rw-r--r-- root/root      64128 2015-03-25 22:50 bbb/ccc/3.txt-rw-r--r-- root/root       1534 2015-03-25 22:50 bbb/ccc/1.txt-rwxr-xr-x root/ root     10688 2015-03-25 22:50 bbb/ccc/2.txt-rw-r--r-- root/root       1534 2015-03-25 23:34 bbb/1.txt-rwxr-xr-x root/root     10688  2015-03-25 23:34 bbb/2.txt-rwxr-xr-x root/root     10688  2015-03-25 23:34 2.txt[[email protected] aaa]#

Update file

[[email protected] aaa]# ls2.txt 3.txt BBB file_2.tar file.zip[[email protected] aaa]# echo "aaaaaa" >> bbb/3.tx T[[email protected] aaa]# TAR-UVF file_2.tar bbb/3.txtbbb/3.txt[[email protected] aaa]#

5. Compress archive Files

Compress a directory by using the gzip command

[[email protected] aaa]# ls2.txt 3.txt BBB file_2.tar file.zip[[email protected] aaa]# TAR-CZVF file_3.tar.gz bbb/bbb /bbb/3.txtbbb/file.zipbbb/ccc/bbb/ccc/3.txtbbb/ccc/1.txtbbb/ccc/2.txtbbb/1.txtbbb/2.txt[[email protected] aaa]# Ls2.txt 3.txt BBB File_2.tar file_3.tar.gz file.zip

Compress packaging with bzip2

[[email protected] aaa]# ls2.txt 3.txt BBB file_2.tar file_3.tar.gz file.zip[[email protected] aaa]# TAR-CJVF file_4 . tar.bz2 Bbb/bbb/bbb/3.txtbbb/file.zipbbb/ccc/bbb/ccc/3.txtbbb/ccc/1.txtbbb/ccc/2.txtbbb/1.txtbbb/2.txt[[email Protected] aaa]# ls2.txt 3.txt bbb file_2.tar file_3.tar.gz file_4.tar.bz2 file.zip

Restoring gzip-Compressed archive files

[Email protected] aaa]# ls2.txt 3.txt bbb file_2.tar file_3.tar.gz file_4.tar.bz2 file.zip[[email protected] aaa]# RM-RF Bbb[[email protected] aaa]# ls2.txt 3.txt file_2.tar file_3.tar.gz file_4.tar.bz2 file.zip[[email protected] A aa]# TAR-XZVF file_3.tar.gzbbb/bbb/3.txtbbb/file.zipbbb/ccc/bbb/ccc/3.txtbbb/ccc/1.txtbbb/ccc/2.txtbbb/1.txtbbb/ 2.txt[[email protected] aaa]# ls2.txt 3.txt bbb file_2.tar file_3.tar.gz file_4.tar.bz2 file.zip

Restore BZIP2 Compressed archive files

[Email protected] aaa]# ls2.txt 3.txt bbb file_2.tar file_3.tar.gz file_4.tar.bz2 file.zip[[email protected] aaa]# RM-RF Bbb[[email protected] aaa]# ls2.txt 3.txt file_2.tar file_3.tar.gz file_4.tar.bz2 file.zip[[email protected] A aa]# TAR-XJVF FILE_4.TAR.BZ2BBB/BBB/3.TXTBBB/FILE.ZIPBBB/CCC/BBB/CCC/3.TXTBBB/CCC/1.TXTBBB/CCC/2.TXTBBB/1.TXTBBB /2.txt[[email protected] aaa]# ls2.txt 3.txt bbb file_2.tar file_3.tar.gz file_4.tar.bz2 file.zip

Package compression Comparison

[Email protected] aaa]# LS-LH file_*-rw-r--r--. 1 root root 170K March 21:27 file_2.tar-rw-r--r--. 1 root root 13K March 21:16 file_3.tar.gz-rw-r--r--. 1 root root 15K March 21:21 file_4.tar.bz2

Special usage: Exclude a file or directory when packaging

[Email protected] aaa]# tar rvf file_2.tar--exclude 2.txt

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Mylinux Note---9th Day