Tar command and tar for full backup and Incremental Backup

First, find out what full backup, Incremental backup, and differential backup are. In short, it can be understood as follows:

• Full backup: Back up all files once.
• Incremental Backup: the difference between this backup and the previous backup.
• Differential backup: Backup Based on full backup.

A tar command

# Create a test folder and file [root @ serv01 web] # cd/data [root @ serv01 data] # ls [root @ serv01 data] # mkdir/work [root @ serv01 Data] # mkdir/work/upload [root @ serv01 data] # cd/work/upload/[root @ serv01 upload] # parts [root @ serv01 upload] # lsaa01.txt aa02.txt aa03.txt aa04.txt aa05.txt # create a compressed package [root @ serv01 data] # tar-CVF upload01.tar/work/upload/tar: removing leading '/' from Member names/work/upload // work/ Upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/work/upload/aa02.txt # view the files contained in the package [root @ serv01 Data] # tar-TF upload01.tarwork/upload/work/upload/aa03.txtwork/upload/aa01.txtwork/upload/aa04.txtwork/upload/aa05.txtwork/upload/aa02.txt # delete data, simulate data loss [root @ serv01 data] # rm-RF/work # decompress [root @ serv01 data] # tar-xvf upload01.tar-C/work/upload/aa03.txtwork /upload /Aa01.txtwork/upload/aa04.txtwork/upload/aa05.txtwork/upload/aa02.txt [root @ serv01 data] # ls/workupload [root @ serv01 data] # contains the file path [root] during compression @ serv01 data] # tar-cpvf upload02.tar/work/upload // work/upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/ upload/aa05.txt/work/upload/aa02.txt # the file path does not need to be specified during decompression [root @ serv01 data] # tar-xpvf upload02.tar/work/upload // work/uplo AD/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/work/upload/aa02.txt [root @ serv01 data] # ls/work/upload # the F parameter is not required, you can use redirection to solve [root @ serv01 data] # tar-CV upload03.tar/work/upload/tar: upload03.tar: cannot stat: No suchfile or directorytar: removing leading '/' from Member names/work/upload // work/upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/ Work/upload/aa02.txtwork/upload/00007550000000000000000000000000121766767060120445 USTAR rootrootwork/upload/aa03.txt00006440000000000000000000000000121766767060133170ustar rootrootwork/upload/aa01.txt00006440000000000000000000000000121766767060133150ustar rootrootwork/upload/aa04.txt00006440000000000000000000000000121766767060133200ustar rootrootwork/upload/aa05.txt0000644000000000000000000000 121766767060133210 USTAR rootrootwork/upload/export rootroottar: exiting with failurestatus due to previous tables [root @ serv01 data] # tar-CV/work/upload/> upload03.tartar: removing leading '/' from Member names/work/upload // work/upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/work/ upload/ Aa02.txt # Delete the directory [root @ serv01 data] # rm-RF/work/# decompress, specify the input source [root @ serv01 data] # tar-XV-C/<upload03.tarwork/upload/work/upload/aa03.txtwork/upload/aa01.txtwork/upload/aa04.txtwork/upload /aa02.txt # view [root @ serv01 data] # ls/work/upload [root @ serv01 data] # tar-TF upload03.tarwork/upload/work/upload/aa03.txtwork/upload/aa01.txtwork/ upload/aa04.txtwork/upload/aa05.txtwork/upload/aa02. TXT # Different Effects of test path addition [root @ serv01 data] # cd/work/[root @ serv01 work] # tar-CF upload04.tarupload/[root @ serv01 work] # tar -TF upload04.tarupload/upload/parts/aa01.txtupload/aa04.txtupload/parts/aa02.txt # decompress the package to the [root @ serv01 work] # tar-XV-C/<upload04.tarupload /upload/aa03.txtupload/aa01.txtupload/aa04.txtupload/aa05.txtupload/aa02.txt [root @ serv01 work] # ls/upload/aa01.t XT aa02.txt aa03.txt aa04.txt aa05.txt create the aa06.txt file [root @ serv01 upload] # Touch aa06.txt [root @ serv01 upload] # cd/data [root @ serv01 data] # tar-TF upload02.tartar: removing leading '/' from Member names/work/upload // work/upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/work/ upload/aa02.txt#increase aa06.txtto [root @ serv01 data] # tar-pvf upload02.tar-r/work/upload/ Aa06.txt/work/upload/aa06.txt [root @ serv01 data] # tar-TF upload02.tartar: removing leading '/' from Member names/work/upload // work/upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/work/ upload/aa02.txt/work/upload/aa06.txt # After modifying the demo file, update the compressed package # edit the file [root @ serv01 data] # Vim/work/upload/aa01.txt # update [root @ serv01 data] # tar-upvf upload02.tar/work/upload // work/ upload/aa01.txt [root @ Serv01 data] # tar-TF upload02.tartar: removing leading '/' from Member names/work/upload // work/upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/work/ upload/aa02.txt/work/upload/aa06.txt/work/upload/aa01.txt # delete the file, then restore [root @ serv01 data] # rm-RF/work/[root @ serv01 data] # ls/work/* ls: cannot access/work /*: no such file or directory [root @ serv01 data] # tar-xpvf upload0 2. tar/work/upload // work/upload/aa03.txt/work/upload/aa01.txt/work/upload/aa04.txt/work/upload/aa05.txt/work/upload/aa02.txt/work/upload /aa06.txt/work/upload/aa01.txt # view the file just updated, no problem found [root @ serv01 data] # Cat/work/upload/aa01.txtthis is aa01.txt # Find the file ending with conf under etc, then Package [root @ serv01 data] # Find/etc/-name "*. conf "| xargs tar-pcvf test01.tar # Find the file ending with conf under etc, but it does not contain yum. conf, and then package [root @ serv01 data] # Find /Etc/-name "*. conf "! -Name "yum. conf" | xargs tar-pcvf test02.tar [root @ serv01 data] # Find/etc/-name "*. conf "! -Name yum. conf | xargs tar-pcvf test02.tar # specify the file, and then back up # Write the configuration file to file1 [root @ serv01 data] # Find/etc-name "*. conf "> file1 # view the file. You can see that the list of all configuration files already exists (note the file path) [root @ serv01 data] # Vim file1#create conf01.tar, then T specifies the file [root @ serv01 data] # tar-cpvf conf01.tar-tfile1 [root @ serv01 data] # tar-TF conf01.tar [root @ serv01 data] # ls-H conf01.tar- l-RW-r -- r -. 1 Root 250 K Aug 2 18:18 conf01.tar

Two tar commands-full backup and Incremental Backup

[Root @ serv01 data] # ls/work/upload/aa01.txt aa02.txt aa03.txt aa04.txt aa05.txt aa06.txt [root @ serv01 data] # rm-RF upload01.tar # This is full backup, unable to implement the Incremental backup function [root @ serv01 data] # tar-cpvf upload01.tar/work/upload/# G specify the flag file [root @ serv01 data] # tar-G flag -cpvfupload01.tar/work /upload/tar: /work/upload: directory is new/work/upload // work/upload/aa01.txt/work/upload/aa02.txt/work/upload/aa03.txt/work/upload/aa04.txt/work/upload/aa05.txt/work /upload/aa06.txt [root @ serv01 data] # Vim flag # create a file [root @ serv01 data] # Touch/work/upload/aa07.txt # change the file [root @ serv01 data] # vim/work/upload/aa02.txt [root @ serv01 data] # tar-G flag -cpvfupload02.tar/work/upload // work/upload/aa02.txt/work/upload/ aa07.txt [root @ serv01 data] # tar-TPF upload02.tar/work/upload // work/upload/aa02.txt/work/upload/aa07.txt [root @ serv01 data] # Touch/work/ upload/aa08.txt [root @ serv01 data] # rm-RF/work/upload [root @ serv01 data] # ls/work/upload/aa02.txt aa03.txt aa04.txt aa05.txt aa06.txt aa07.txt aa08.txt [root @ serv01 data] # tar-G flag -cpvfupload03.tar/work/upload // work/upload/aa08.txt # restore full backup, successive recovery # data loss [root @ serv01 data] # rm-RF/work/* [root @ serv01 data] # ls/work/# restore full backup [root @ serv01 Data] # tar-G flag -xpvfupload01.tar/work/upload // work/upload/aa01.txt/work/upload/aa02.txt/work/upload/aa03.txt/work/upload/aa04.txt/work/upload/ aa05.txt/work/upload/aa06.txt # The data returned [root @ serv01 data] # ls/work/upload/aa01.txt aa02.txt aa03.txt aa04.txt aa05.txt aa06.txt1_aa02.txt file, the content is not found in [root @ serv01 data] # Cat/work/upload/aa02.txt.pdf restore the file, from the upload02.tar file [root @ serv01 data] # tar-G flag -xpvfupload02.tar/work/upload//aa02.txt/work/upload/aa07.txt1_aa02.txt file, the content is returned. [root @ serv01 data] # Cat/work/upload/aa02.txthello world‑restore the file, and [root @ serv01 data] # tar-G flag -xpvfupload03.tar/work/upload/tar: deleting '/work/upload/aa01.txt'/work/upload/aa08.txt [root @ serv01 data] # ls/work/upload/aa02.txt aa03.txt aa04.txt aa05.txt aa06.txt aa07.txt aa08.txt

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