LinuxQuestions.org - [SOLVED] Using split and tar to get the compressed files

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ytyyutianyun

12-09-2013 12:42 AM

Using split and tar to get the compressed files

My code is:

Code:

nohup tar -zcvf *.cas | split -d -b 200m &

My document is

Quote:

3d_mesh-0100.cas
3d_mesh-0200.cas
3d_mesh-0300.cas
3d_mesh-0400.cas
3d_mesh-0500.cas
3d_mesh-0600.cas
3d_mesh-0700.cas
3d_mesh-0800.cas
3d_mesh-0900.cas
3d_mesh-1000.cas
3d_mesh-1100.cas

Each is 118mb

But strange thing is the size of 3d_mesh-0100.cas became bigger, and nothing else happens.

What I want is to put into all the *.cas into file and then spilt into documents. Then how can I do it?

berndbausch

12-09-2013 12:54 AM

Quote:

Originally Posted by ytyyutianyun (Post 5077717)

My code is:

Code:

nohup tar -zcvf *.cas | split -d -b 200m &

Your tar command uses the first cas file as the archive name. If you want to create the archive on Standard Output, you have to write:

Code:

nohup tar -zcvf - *.cas | <....>

ytyyutianyun

12-09-2013 01:07 AM

Quote:

Originally Posted by berndbausch (Post 5077724)

Your tar command uses the first cas file as the archive name. If you want to create the archive on Standard Output, you have to write:

Code:

nohup tar -zcvf - *.cas | <....>

You are great
And I use the code well

Code:

nohup tar -zcvf - *.cas | split -d -b 200m - film_ &

ytyyutianyun

12-09-2013 08:03 AM

split and cat and unzip error?

I use the code to package files and split

Code:

nohup tar -zcvf - *.cas | split -d -b 200m - film_ &

My document is

Quote:

3d_mesh-0100.cas
3d_mesh-0200.cas
3d_mesh-0300.cas
3d_mesh-0400.cas
3d_mesh-0500.cas
3d_mesh-0600.cas
3d_mesh-0700.cas
3d_mesh-0800.cas
3d_mesh-0900.cas
3d_mesh-1000.cas
3d_mesh-1100.cas

and then in order to test whether it is good. I merged it and extract it
code : merge

Code:

cat film_* > cas_bak.tar.gz

and then
code: extract it

Code:

tar -zxvf cas_bak.tar.gz

But it shows that:

Quote:

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error exit delayed from previous errors
#

Why?

colucix

12-09-2013 08:12 AM

If you try

Code:

tar -zcvf - *.cas

you get

Code:

3d_mesh-0100.cas

3d_mesh-0200.cas

3d_mesh-0300.cas

3d_mesh-0400.cas

3d_mesh-0500.cas

3d_mesh-0600.cas

3d_mesh-0700.cas

3d_mesh-0800.cas

3d_mesh-0900.cas

3d_mesh-1000.cas

3d_mesh-1100.cas

gzip: compressed data not written to a terminal. Use -f to force compression.

For help, type: gzip -h

tar: Child returned status 1

tar: Error is not recoverable: exiting now

Therefore you can try the following using option -f of gzip:

Code:

tar -cvf - *.cas | gzip -cf | split -d -b 1m - film_

This should do the trick.

ytyyutianyun

12-09-2013 09:20 PM

Quote:

Originally Posted by colucix (Post 5077852)

If you try

Code:

tar -zcvf - *.cas

you get

Code:

3d_mesh-0100.cas

3d_mesh-0200.cas

3d_mesh-0300.cas

3d_mesh-0400.cas

3d_mesh-0500.cas

3d_mesh-0600.cas

3d_mesh-0700.cas

3d_mesh-0800.cas

3d_mesh-0900.cas

3d_mesh-1000.cas

3d_mesh-1100.cas

gzip: compressed data not written to a terminal. Use -f to force compression.

For help, type: gzip -h

tar: Child returned status 1

tar: Error is not recoverable: exiting now

Therefore you can try the following using option -f of gzip:

Code:

tar -cvf - *.cas | gzip -cf | split -d -b 1m - film_

This should do the trick.

I use the code:

Code:

tar -cvf - *.cas | gzip -cf | split -d -b 200m - film_

And when I merged and unrar it.

it shows:

Quote:

tar -zxvf cas_bak.tar.gz
tar: This does not look like a tar archive
tar: Skipping to next header
tar: Archive contains obsolescent base-64 headers
tar: A lone zero block at 22581

tar: Error exit delayed from previous errors

Why?

WarTurkey

12-11-2013 05:24 AM

What is the command that you used to concatenate the split files?

WarTurkey

12-11-2013 05:26 AM

And did you have a backup of that "3d_mesh-0100.cas" file? Otherwise it looks like it was overwritten after your first command...

ytyyutianyun

12-11-2013 10:44 PM

Quote:

Originally Posted by WarTurkey (Post 5078888)

And did you have a backup of that "3d_mesh-0100.cas" file? Otherwise it looks like it was overwritten after your first command...

Because the strange "3d_mesh-0100.cas", so I delete it before running the command.

And I use this code to "merge"

Code:

cat film_* > cas_bak.tar.gz

colucix

12-12-2013 02:18 AM

It's difficult to debug this issue without having the same files. I tried what suggested on my system and it worked flawlessly. Anyway, first please tell us what is your operating system and which version of tar you have. Then, please try one step at a time, instead of the pipeline and check the results at each step. That is:

Code:

tar -cvf tmp.tar *.cas

gzip tmp.tar

split -d -b 1m tmp.tar.gz film_

cat film_* > cas_bak.tar.gz

check the files produced at each step and try to discover where the problem comes from.

ytyyutianyun

12-12-2013 07:08 PM

Quote:

Originally Posted by colucix (Post 5079334)

Code:

tar -cvf tmp.tar *.cas

gzip tmp.tar

split -d -b 1m tmp.tar.gz film_

cat film_* > cas_bak.tar.gz

check the files produced at each step and try to discover where the problem comes from.

OS: Suse enterprise server
tar:tar (GNU tar) 1.15.1

And it is Ok,based the command saved in shell

Code:

mkdir splitfile

tar -zcvf splitfile/cas.tgz *.cas

split -d -b 200m splitfile/cas.tgz splitfile/cas_

tar -zcvf splitfile/dat.tgz *.dat

split -d -b 200m splitfile/dat.tgz splitfile/dat_

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