We all use cron (this part of the world, “open source” world). But some times we wouldn’t want to send the output or error messages to root, or anyone in /etc/aliases. Only to an email we trust or a normal user on the server. Cron is flexible. Thanks Vixie, Paul Vixie.
Problem :
Status of cron jobs are often sent to root of the server. Is there a way to only send to another email address other then root? or other then the aliases in /etc/aliases?
Solution :
One fine day while checking up on cron backup job on the server, it recorded an error while doing a rsync to the backup storage server. All other users have no problem login onto the backup storage server, just this particular username have problem. After checking out the interactive verbose output of the attempt ssh server session, public & private key, log files, server user’s credentianls, below is the solution :
Problem :
ssh to server that uses only public key authentication only persistently got,
Permission denied (publickey).
Checked log file and got,
sshd: Authentication refused: bad ownership or modes for directory /user/home/directory
Solution :
Apache & php are a essential to any open source servers. Not just only web, but a lot of utilities / programs are running on them as well. This make them popular. Popular to target vulnerabilities. Program bugs are also less desirable if not patching them regularly. Not to mentioned the latest functionalities that will make our life easier. All in all, less user complains, more user prasing. :p
Problem :
Upgrading php prior 5.2.8 giving errors. e.g.
warning: package ‘php5-pcre-5.2.6_2′ requires ‘php5-5.2.8′, but ‘php5-pcre-5.2.6_2′ is installed
Solution :
Problem :
Error found in log file,
general: error: dumping master file: master/tmp-cFRWfFf7ah: open: permission denied
while doing a “rndc“, “/etc/rc.d/named restart” or “/etc/init.d/named restart“.
Solution :
Problem :
search every files recursively from the current directory that the modification time is the last 14 days with .conf extension
Solution :
Problem :
SSH server / PC in a close network unable to open port 22 or ssh port for public access
Solution :
FreeBSD :
pw usermod username -G grouplist
** grouplist is a comma separated list of group to be assign to the username. Exit & login again for the group permission to take effect.
Linux :
usermod -G groupname username
Adiós !!!
Problem :
While doing one of the below :
apachectl start
apachectl restart
/usr/local/etc/rc.d/apache start
/usr/local/etc/rc.d/apache restart
an error message appear
No such file or directory: Failed to enable the 'httpready' Accept Filter
Solution :
After re-installing a new wordpress blog, we only found out that the akismet plugin key id has lost. But without the akismet plugin key, akismet simply won’t allow to activate. We could apply a new account from wordpress.com but that would render our presiously applied wordpress.com account email address useless. More over, one might only have 1 email address to spend. How do we recover it? Scroll down :
