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Rescheduling mlocate to run weekly instead of daily

 Commands, Ubuntu  No Responses »
Apr 102010
 

Rescheduling mlocate to run weekly instead of daily

Answer:

As explained before, mlocate is a useful tool for quickly find files on the filesystem based on their name.

When you installed the mlocate, it created a daily cron job under /etc/cron.daily/ which build the database daily. However, it is quite IO intensive when you build the database, and it is not recommended to run the indexing in a production server in such high frequency...it is better to run it weekly or monthly.

E.g. To reschedule the the cron job to run weekly

# mv /etc/cron.daily/mlocate /etc/cron.weekly/

SSH takes a long time to connect or log in

 Basic Linux, Ubuntu  1 Response »
Apr 102010
 

SSH takes a long time to connect or log in

Answer

If you experienced slow SSH connect to a remote server, you can try to disable the reverse DNS lookup at the server.

1. Edit the sshd_config

# sudo vi /etc/ssh/sshd_config

2. Add the following line in sshd_config

UseDNS no

3. Restart sshd

# sudo /etc/init.d/ssh restart

Installing Python modules with easy_install

 Python, Ubuntu  No Responses »
Mar 072010
 

Installing Python modules with easy_install

Answer:

Install Python modules cannot be easier with easy_install.

To use easy_install, you can use apt-get to install the "python-setuptools" package

# sudo apt-get install python-setuptools

Then you can use easy_install to install the module you want, e.g. pymongo

# sudo easy_install pymongo

Put a profile in AppArmor complain mode

 Linux Security, MySQL, Ubuntu  No Responses »
Feb 182010
 

Put a profile in AppArmor complain mode

Answer:

Some applications, such as the MySQL server, if you changed the default datadir, you might not be able to startup MySQL.

To solve the problem, put the MySQL profile in AppArmor complain mode can solve the problem.

# sudo aa-complain /usr/sbin/mysqld

Then reload AppArmor

# sudo invoke-rc.d apparmor reload

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