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Shell Script Permissions Issue

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Shell Script Permissions Issue Linux Help forum discussing topics including usage, troubleshooting, modules, and distributions. Linux is an open source OS, based on UNIX.

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  #1  
Old May 3rd, 2008, 11:41 AM
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Shell Script Permissions Issue
I've been having problems with LogRotate, so while I troubleshoot them, I've written a little shell script to rotate my qmail scanner log.
Code:
#!/bin/bash

LOGFILE=/var/spool/qmailscan/qmail-queue.log

tar -cvvf ~/qmail-queue.backup.tar.gz $LOGFILE
echo "" > $LOGFILE
I've also added a cron job to run it...
Code:
#rotate logs every saturday at 12am
0 0 * * * /var/qmail/bin/qmail-queue-log-rotate.sh 2> /dev/null
Now, when I try to run it from the command line, even as root, I get this:
Quote:
[root@localhost bin]# ./qmail-queue-log-rotate.sh
-bash: ./qmail-queue-log-rotate.sh: Permission denied
What am I doing wrong?
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  #2  
Old May 3rd, 2008, 12:28 PM
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what user is running the script? Is it root?
If not, you need to do whatever your distro wants, sudo or equivalent
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Old May 3rd, 2008, 12:50 PM
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Quote:
Originally Posted by fishtoprecords
what user is running the script? Is it root?
If not, you need to do whatever your distro wants, sudo or equivalent
Owner is root.
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  #4  
Old May 3rd, 2008, 01:13 PM
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can you execute the commands by hand as root?
You could have 444 or some equivalent protection that does not allow root to write
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Old May 3rd, 2008, 01:23 PM
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I changed the permissions, now I don't get "permission denied", here's the output:
Quote:
[root@localhost qmailscan]# ./qmail-queue-rotate.sh
tar: Removing leading `/' from member names
-rw------- qscand/vchkpw 21827 2008-05-03 11:21:04 var/spool/qmailscan/qmail-queue.log
It does seem to be "zeroing" out the log file. But it does not generate the file qmail-queue.backup.tar.gz
Last edited by Weekend Coder : May 3rd, 2008 at 01:30 PM.
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  #6  
Old May 3rd, 2008, 02:29 PM
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Do you really have it

Quote:
tar -cvvf


rather than something like tar -cvzf
create verbose gZip file
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  #7  
Old May 3rd, 2008, 02:32 PM
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Quote:
Originally Posted by fishtoprecords
Do you really have it



rather than something like tar -cvzf
create verbose gZip file
Can you provide example?
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  #8  
Old May 3rd, 2008, 02:37 PM
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I just did. Your upthread posting says
Quote:
tar -cvvf ~/qmail-queue.backup.tar.gz $LOGFILE


which does not work for me. you are missing the z, instead you have to v

Quote:
tar -cvzf ~/qmail-queue.backup.tar.gz $LOGFILE


Before you try to debug a shell script, make sure that the commands work manually
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  #9  
Old May 3rd, 2008, 03:14 PM
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Oh, I see. Also, I changed the tilde (~).
Quote:
tar -cvzf ./qmail-queue.backup.tar.gz $LOGFILE
THANKS!
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  #10  
Old May 3rd, 2008, 03:19 PM
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I was wondering about that; the ~ tilde represents the user's home directory, in this case I suppose it would be /root.

I recommend using the full path to the file when using scripts like this, especially in conjunction with cron.
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  #11  
Old May 3rd, 2008, 03:20 PM
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yes, ~ in cron scripts can be confusing. Much more obvious to be explicit
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