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In SuSE you have 3 security levels, which determine what permissions.* file is applied
to the filesystem:
easy, secure and paranoid. So you have permissions.easy , permissions.secure and
permissions.paranoid files under /etc. You can set the security level via YAST ->
Security and Users -> Security Settings
You can also edit the corresponding permissions.* file.
Looks that on SLES 11 and SLES 10 with security setting secure (with easy setting thing are OK) systems permissions for crontab are
-rwsr-x--- 1 root trusted 40432 May 8 2012 /usr/bin/crontab
And ordinary users are unable to use cron.
This strange permission setting occurs because on this particular server security level option (set in YAST in Security & Hardening) when the security level is set to "secure" template, instead of the default (easy). If this setting is in place, that means that no ordinary user can use crontab. Looks like for secure security setting (with easy setting thing are OK) in their infinite wisdom SLES developers introduced group trusted as if cron.allow and cron.deny files are not enough.
I would recommend resetting permission to 4755
-rwsr-xr-x 1 root trusted 40432 May 8 2010 /usr/bin/crontab
In addition to changing the permissions of crontab, you also have to put a line in /etc/permissions.local in order to keep updates from changing it back to 4750.
/usr/bin/crontab root:trusted 4755
I tested this solution and it looks like it works.
By default group trusted has no members, but what is interesting that adding user (say oracle) to this group did not solve the problem for me.
The most relent post on the subject that I have found is by the user dsonck92 in Open sus forum (user access crontab, 01-Dec-2011)
If anyone comes across this same problem with openSUSE 12.1 or maybe an earlier/later version, this is the reason/solution:
There is a system that checks the permissions of important files/programs. With YaST you can change your file security setting to
easy/secure/paranoidusing the 'Security Center and Hardening' tool. A program called 'chkstat' will then check and change the permissions of the files according to /etc/permissions.* at boot time.
When you set the permissions to secure, this program will (according to permissions.secure) change the permissions of /usr/bin/crontab to 4750 with the owner to root:trusted in order to prevent untrusted people from accessing important files (like crontab).
If you want the old situation back, you can either:
- Choose the easy permissions option in YaST,
- Add yourself to the group 'trusted', This way you won't get the warning unsafe profile, the permissions will be correct at boot time and it won't be overwritten when updating some package.
- A third option is to add the line '/usr/bin/crontab root:root 4755' to /etc/permissions.local. It has the same result as adding yourself to 'trusted' but the permissions are not safe. Use with caution.
Again, adding the user it the group trusted for me did not work.
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dsonck92 , 01-Dec-2011
If anyone comes across this same problem with openSUSE 12.1 or maybe an earlier/later version, this is the reason/solution:
There is a system that checks the permissions of important files/programs. With YaST you can change your file security setting to easy/secure/paranoid
using the 'Security Center and Hardening' tool. A program called 'chkstat' will then check and change the permissions of the files according to /etc/permissions.*
at boot time.When you set the permissions to secure, this program will (according to permissions.secure) change the permissions of /usr/bin/crontab to
4750 with the owner to root:trusted in order to prevent untrusted people from accessing important files (like crontab).If you want the old situation back, you can either:
- Choose the easy permissions option in YaST,- Add yourself to the group 'trusted', This way you won't get the warning unsafe profile, the permissions will be correct at boot time and it won't be overwritten when updating some package.
- A third option is to add the line '/usr/bin/crontab root:root 4755' to /etc/permissions.local. It has the same
result as adding yourself to 'trusted' but the permissions are not safe. Use with caution.
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" -bash: /usr/bin/crontab: Permission denied ".
I was getting this error earlier today while trying to add cron jobs for my login on my SLES 10 box at work. Turns out that all users in SLES 10 by default have no access to cron.
The fix is to add the user to the "trusted" group in the group file (/etc/group). Let's assume mu login is "elf".
1. Make sure you are "root".
2. #usermod -G trusted elf
This will add the user to the "trusted" group.3. #id elf
Display groups the user belongs to. Make sure "trusted" is on the list too.
The output might look like this. "uid=502(danny) gid=502(users) groups=502(elf),11(trusted)"
4. #su – elf
Change user5. #crontab -e
Add/Remove/Edit user cron jobs.6. #crontab -l
List user scheduled cron jobs
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-bash: /usr/bin/crontab: Permission denied
december 30th, 2008
Yenlo
Software development
No CommentsBy default de Oracle user has no priviledges to add cron jobs under SLES 10.
when trying to do so you will recieve an error which looks something close to this :oracle@xxx:~> crontab -l
-bash: /usr/bin/crontab: Permission deniedThe solution to this is to add the "trusted" group to the user oracle.
To so this , you can login as root and preform this command :[]oracle@xxx:~> su
Password:
xxx:/ # usermod -G trusted oracle
xxx:/ # exit
[]oracle@xxx:~> crontab -l
-bash: /usr/bin/crontab: Permission deniedAfter have done so, you need to login with oracle again to let the changes work.
[]oracle@xxx:~> su - oracle
Password:
[]oracle@xxx:~> crontab -l
no crontab for oracleYou can now either use
[]oracle@xxx:~>crontab -e
(to add,remove or edit the oracle cron jobs)
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Could someone explain me why would cPanel change the permissions of crontab incorrectly? I had fixed them and on the update they got messed up again. Is this a bug or is there something wrong on my server?
/usr/bin/crontab permissions are wrong. Please set to 4755
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