IT博客汇 | Linux：分片【Split】压缩与解压缩

Linux：分片【Split】压缩与解压缩

Adamhuan发表于 2016-09-18 06:27:11

在Symantec下载得到NetBackup的安装介质的时候，你会发现，它们是诸如下列的方式存在的：

[root@localhost NetBackup]# pwd
/software/NetBackup
[root@localhost NetBackup]# ls
NB_CLT_7.6.0.3-tar_split.1of3  NB_CLT_7.6.0.3-tar_split.2of3  NB_CLT_7.6.0.3-tar_split.3of3
[root@localhost NetBackup]# 
[root@localhost NetBackup]# du -sh *
1.5G	NB_CLT_7.6.0.3-tar_split.1of3
1.5G	NB_CLT_7.6.0.3-tar_split.2of3
1.5G	NB_CLT_7.6.0.3-tar_split.3of3
[root@localhost NetBackup]#

这里的压缩包并不能通过【tar -xf】去直接解压，以往内说那个文件为同一个压缩包分片后的结果。

一、解压缩分片压缩文件
解压分片的压缩包需要按照下面的步骤执行：
1. 合并分片：

[root@localhost NetBackup]# ls
NB_CLT_7.6.0.3-tar_split.1of3  NB_CLT_7.6.0.3-tar_split.2of3  NB_CLT_7.6.0.3-tar_split.3of3
[root@localhost NetBackup]# 
[root@localhost NetBackup]# du -sh *
1.5G	NB_CLT_7.6.0.3-tar_split.1of3
1.5G	NB_CLT_7.6.0.3-tar_split.2of3
1.5G	NB_CLT_7.6.0.3-tar_split.3of3
[root@localhost NetBackup]# 
[root@localhost NetBackup]# cat NB_CLT_7.6.0.3-tar_split.* > NB_CLT_7.6.0.3-tar
[root@localhost NetBackup]# 
[root@localhost NetBackup]# ls
NB_CLT_7.6.0.3-tar  NB_CLT_7.6.0.3-tar_split.1of3  NB_CLT_7.6.0.3-tar_split.2of3  NB_CLT_7.6.0.3-tar_split.3of3
[root@localhost NetBackup]# 
[root@localhost NetBackup]# du -sh *
4.3G	NB_CLT_7.6.0.3-tar
1.5G	NB_CLT_7.6.0.3-tar_split.1of3
1.5G	NB_CLT_7.6.0.3-tar_split.2of3
1.5G	NB_CLT_7.6.0.3-tar_split.3of3
[root@localhost NetBackup]#

2. 合并分片完成后，就可以像正常的tar文件（压缩文件）去操作解压缩了：

[root@localhost NetBackup]# tar -xf NB_CLT_7.6.0.3-tar
[root@localhost NetBackup]# 
[root@localhost NetBackup]# ls
NB_CLT_7.6.0.3-tar                    VrtsNB_CLT_7.6.0.3.HP-UX-IA64.tar.gz  VrtsNB_CLT_7.6.0.3.preinstall
NB_CLT_7.6.0.3-tar_split.1of3         VrtsNB_CLT_7.6.0.3.INTEL.tar.gz       VrtsNB_CLT_7.6.0.3.README
NB_CLT_7.6.0.3-tar_split.2of3         VrtsNB_CLT_7.6.0.3.Linux.tar.gz       VrtsNB_CLT_7.6.0.3.RS6000.tar.gz
NB_CLT_7.6.0.3-tar_split.3of3         VrtsNB_CLT_7.6.0.3.MACINTOSH.tar.gz   VrtsNB_CLT_7.6.0.3.Solaris.tar.gz
NB_update.install                     VrtsNB_CLT_7.6.0.3.postinstall
VrtsNB_CLT_7.6.0.3.HP9000-800.tar.gz  VrtsNB_CLT_7.6.0.3.postuninstall
[root@localhost NetBackup]#

这样，分片压缩文件就解压完成了。

二、创建分片压缩文件
1. 创建压缩文件：

[root@vistor-server software]# ls -ltr
total 4558056
-rw-r--r-- 1 root root 4662882304 Sep 17 22:57 MicrosoftSQLServer2008R2.iso
[root@vistor-server software]# 
[root@vistor-server software]# du -sh MicrosoftSQLServer2008R2.iso 
4.4G	MicrosoftSQLServer2008R2.iso
[root@vistor-server software]# 
[root@vistor-server software]# tar -czvp -f MicrosoftSQLServer2008R2.iso.tar.gz MicrosoftSQLServer2008R2.iso 
MicrosoftSQLServer2008R2.iso
[root@vistor-server software]# 
[root@vistor-server software]# ls -ltr
total 8129276
-rw-r--r-- 1 root root 4662882304 Sep 17 22:57 MicrosoftSQLServer2008R2.iso
-rw-r--r-- 1 root root 3653351405 Sep 17 23:15 MicrosoftSQLServer2008R2.iso.tar.gz
[root@vistor-server software]# 
[root@vistor-server software]# du -sh *
4.4G	MicrosoftSQLServer2008R2.iso
3.5G	MicrosoftSQLServer2008R2.iso.tar.gz
[root@vistor-server software]#

2. 创建分片：

[root@vistor-server software]# ls
MicrosoftSQLServer2008R2.iso  MicrosoftSQLServer2008R2.iso.tar.gz
[root@vistor-server software]# 
[root@vistor-server software]# du -sh *
4.4G	MicrosoftSQLServer2008R2.iso
3.5G	MicrosoftSQLServer2008R2.iso.tar.gz
[root@vistor-server software]# 
[root@vistor-server software]# split -b 500m MicrosoftSQLServer2008R2.iso.tar.gz MicrosoftSQLServer2008R2.iso.tar.gz_split. --verbose
creating file `MicrosoftSQLServer2008R2.iso.tar.gz_split.aa'
creating file `MicrosoftSQLServer2008R2.iso.tar.gz_split.ab'
creating file `MicrosoftSQLServer2008R2.iso.tar.gz_split.ac'
creating file `MicrosoftSQLServer2008R2.iso.tar.gz_split.ad'
creating file `MicrosoftSQLServer2008R2.iso.tar.gz_split.ae'
creating file `MicrosoftSQLServer2008R2.iso.tar.gz_split.af'
creating file `MicrosoftSQLServer2008R2.iso.tar.gz_split.ag'
[root@vistor-server software]# 
[root@vistor-server software]# ls
MicrosoftSQLServer2008R2.iso                  MicrosoftSQLServer2008R2.iso.tar.gz_split.ad
MicrosoftSQLServer2008R2.iso.tar.gz           MicrosoftSQLServer2008R2.iso.tar.gz_split.ae
MicrosoftSQLServer2008R2.iso.tar.gz_split.aa  MicrosoftSQLServer2008R2.iso.tar.gz_split.af
MicrosoftSQLServer2008R2.iso.tar.gz_split.ab  MicrosoftSQLServer2008R2.iso.tar.gz_split.ag
MicrosoftSQLServer2008R2.iso.tar.gz_split.ac
[root@vistor-server software]# 
[root@vistor-server software]# du -sh *
4.4G	MicrosoftSQLServer2008R2.iso
3.5G	MicrosoftSQLServer2008R2.iso.tar.gz
501M	MicrosoftSQLServer2008R2.iso.tar.gz_split.aa
501M	MicrosoftSQLServer2008R2.iso.tar.gz_split.ab
501M	MicrosoftSQLServer2008R2.iso.tar.gz_split.ac
501M	MicrosoftSQLServer2008R2.iso.tar.gz_split.ad
501M	MicrosoftSQLServer2008R2.iso.tar.gz_split.ae
501M	MicrosoftSQLServer2008R2.iso.tar.gz_split.af
485M	MicrosoftSQLServer2008R2.iso.tar.gz_split.ag
[root@vistor-server software]#

这样，就创建了分片压缩文件。

——————————————————
Done。