taring and gzipping all at once

[jerehart]

I am trying to gzip some files and then pipe it into tar but can't get it right.

I have tried:

gzip -vr * | tar cvf /dev/rmt/0 -
tar cvf /dev/rmt/0 `gzip -vr *`
tar cvf /dev/rmt/0 `ls `gzip -vr *``

any ideas?
Miah

 

[pgsmith]

Hi jerehart,

Hope this helps. Try:
gzip -vr * ; tar cvf /dev/rmt/0 *


Pete

 

[jaSun]

I am not familiar with the flags to use with gzip, but here is how I do it with compress:

tar -cvf - dir | compress -c > filename.tar.Z

uncompress -c file | tar -xvf -

 

[jerehart]

JaSun,

I have tried that with gzip, but tar files don't compress as much as raw files. any hoop thanks for the ideas guys!

Miah

 

[d3funct]

Try this:

gzip -{whatever flags} {filenames to gzip} && tar -cvf tarfile.tar /dev/rmt0 (or wherever you want tarfile). To verify the tarfile looks like you want do tar -tvf tarfilename.tar

Hope this helps. B-) d3funct
vanya43@yahoo.com
The software required `Windows 95 or better', so I installed Linux.

 

[jerehart]

d3funct

I tried the command:

gzip -vr * && tar cvf /dev/rmt/0 .

and I the files got gziped but no tar file was made. Asking around no one knows what && is supposed to do. any hints?


Miah

 

[d3funct]

&& basically says "do this and then do that", I just ran it on a Solaris 7 machine, and I know it works on Solaris 8 also. The command should gzip them and when finished gzipping it should then do the tar. d3funct
vanya43@yahoo.com
The software required `Windows 95 or better', so I installed Linux.

 

[jaSun]

Here is how it is done:

tar -cvf - dir | gzip -c > filename.tar.gz

gunzip -c file | tar -xvf -

This will tar and compress on the fly instead of tarring, then compressing. Should use much less disk space as it runs.

Jason

 

[nzbarnes]

The && talked about above is essentially a short hand way of doing an if statement e.g. in the line:

command 1 && command 2

command 2 will only be executed if command 1 is successful(zero exit status). You can add to this line thus:

command 1 && command 2 || command 3

In this line command 2 gets executed if command 1 is successful and command 3 gets executed if it is not.

In short && means a logical and, || means a logical or.

Cheers,

Stephen

 

[rjdscs]

Another solution is to get a copy of GNU tar that has a switch to automatically envoke gzip.

Richard