Tar - pre-checking before making the Tar file


 
Thread Tools Search this Thread
Operating Systems AIX Tar - pre-checking before making the Tar file
# 1  
Old 06-07-2016
Tar - pre-checking before making the Tar file

Coming from this thread, just wondering if there is an option to check if the Tar of the files/directory will be without any file-errors without actually making the tar.

Scenario:
Let's say you have a directory of 20GB, but you don't have the space to make Tar file at the moment, and you want to check before you actually make Tar achieve file, that all the files in the directory can be Tarred, how would you achieve this ?

Thanks
# 2  
Old 06-07-2016
Obviously during a tar operation you can get errors reading the files and errors writing the archive. The archive can be a disk file, a tape drive, or some other device. One output device is /dev/null which is a black hole to nowhere. If you send the archive to that you will still see any reading errors.
This User Gave Thanks to hicksd8 For This Post:
# 3  
Old 06-08-2016
Thanks, so making a tar of directory = 20GB and sending it to /dev/null would not require additional free space of 20GB
# 4  
Old 06-08-2016
Correct.

sent from my HTC smartphone
This User Gave Thanks to hicksd8 For This Post:
# 5  
Old 06-10-2016
how about redirecting the output to a text file, that's also an option

Code:
root@clodb:/clodbvg>/opt/freeware/bin/tar cvf -  /oradata | gzip > /clodbvg/bkp_30MAY16.tgz

re-directing the output to a file test.txt, so how would I do that for the above command ?
# 6  
Old 06-10-2016
Quote:
Originally Posted by filosophizer
Code:
root@clodb:/clodbvg>/opt/freeware/bin/tar cvf -  /oradata | gzip > /clodbvg/bkp_30MAY16.tgz

re-directing the output to a file test.txt, so how would I do that for the above command ?
Here is one way:

Code:
( /opt/freeware/bin/tar cvf -  /oradata | gzip > /clodbvg/bkp_30MAY16.tgz ) > test.txt 2>&1

This User Gave Thanks to jlliagre For This Post:
# 7  
Old 06-11-2016
If you want to see the output on screen but also capture it then you can have the best of both worlds using the 'tee' command:

Code:
<whatever command> | tee <output text capture file>

This User Gave Thanks to hicksd8 For This Post:
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. AIX

Making Tar of directory and tar file is going to be placed

Quick question, is it possible to make a Tar of completely directory and placing the tar file in it (will this cause even the tar file to tarred ?) sample: /opt/freeware/bin/tar -cvf - /oracle | gzip > /oracle/backup.tgz will the tar file backup.tgz also include backup.tgz ? i tried... (5 Replies)
Discussion started by: filosophizer
5 Replies

2. UNIX for Dummies Questions & Answers

UNIX command to check if file name ends with .tar OR if the file is a tar file

Hello Team, Would you please help me with a UNIX command that would check if file is a tar file. if we dont have that , can you help me with UNIX command that would check if file ends with .tar Thanks in advance. (10 Replies)
Discussion started by: sanjaydubey2006
10 Replies

3. UNIX for Dummies Questions & Answers

Do I need to extract the entire tar file to confirm the tar folder is fine?

I would like to confirm my file.tar is been tar-ed correctly before I remove them. But I have very limited disc space to untar it. Can I just do the listing instead of actual extract it? Can I say confirm folder integrity if the listing is sucessful without problem? tar tvf file1.tar ... (1 Reply)
Discussion started by: vivien_chu
1 Replies

4. UNIX for Advanced & Expert Users

Move files while making a tar

I have the following folder structure code/f1/ code/lib/t1 code/lib/t2 code/lib/t3 code/lib/t3 code/lib_1/t1 code/exc I would like to create a tar with a folder structure below and I can use the following tar command f1 lib/t1 lib/t2 lib/t3 tar -cvf code.tar -C code f1 lib... (4 Replies)
Discussion started by: alpboys
4 Replies

5. Shell Programming and Scripting

tar command to explore multiple layers of tar and tar.gz files

Hi all, I have a tar file and inside that tar file is a folder with additional tar.gz files. What I want to do is look inside the first tar file and then find the second tar file I'm looking for, look inside that tar.gz file to find a certain directory. I'm encountering issues by trying to... (1 Reply)
Discussion started by: bashnewbee
1 Replies

6. UNIX for Dummies Questions & Answers

Making tar of a remote file system

Hello, I was asked by my boss to make a backup of one of our systems that is slated to be decommissioned. When I suggested if could tar the "/" directory he nodded and said that would do the trick, When I try and execute the command I get EOF error. I think it is because there is not enough... (2 Replies)
Discussion started by: mojoman
2 Replies

7. UNIX for Dummies Questions & Answers

tar -cvf test.tar `find . -mtime -1 -type f` only tar 1 file

Hi all, 4 files are returned when i issue 'find . -mtime -1 -type f -ls'. ./ora_475244.aud ./ora_671958.aud ./ora_934052.aud ./ora_934050.aud However, when I issued the below command: tar -cvf test.tar `find . -mtime -1 -type f`, the tar file only contains the 1st file -... (2 Replies)
Discussion started by: ahSher
2 Replies

8. UNIX for Advanced & Expert Users

Tar utility (untar a .tar file) on VxWorks

Hi All Can someone pls guide me if there any utility to compress file on windows & uncompress on vxworks I tried as - - compressed some folders on windows ... i created .tar ( to maintain directory structure ) and compressed to .gz format. - on VxWorks i have uncompressed it to .tar... (1 Reply)
Discussion started by: uday_01
1 Replies

9. Shell Programming and Scripting

extract one file form .tar.gz without uncompressing .tar.gz file

hi all, kindly help me how to extract one file form .tar.gz without uncompressing .tar.gz file. thanks in advance bali (2 Replies)
Discussion started by: balireddy_77
2 Replies

10. UNIX for Advanced & Expert Users

Does tar do crc checking on a tape or tar file?

Trying to answer a question about whether tar table-of-contents is a good tool for verifying tape data. (1 Reply)
Discussion started by: tjlst15
1 Replies
Login or Register to Ask a Question