When i am trying to setup a new server, most of the time i just used the default settings of Apache. But sometimes if the server is not equipped with enough RAM, the Apache service may consume all the server resources causing server failure. Here is an example for limited the resource comsumption by Apache.
Continue reading Ubuntu – Limit the RAM consumption by Apache
Category Archives: Linux
Linux – Find the process which occupies a specific port
Either one of the following commands could show you the process which is running a specific port
- lsof -i :<port>
- netstat -tulpn | grep :<port>
Here is an example on my Ubuntu server.
root@li266-91:~# netstat -tulpn | grep :80 tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 31024/apache2
Apache is running on port 80.
Done =)
Reference: How do I determine which application is using port 8080?
Linux – Check Memory Usage of a Specific Process
Use the following command to check the memory usage of a specific process.
- cat /proc/<process ID>/status
You will get the following output. Continue reading Linux – Check Memory Usage of a Specific Process
Python – Install a Python2.5 on Ubuntu Lucid @ 2
Another way to install extra Python package is by source.
1. Install the build-essential and gcc.
- sudo apt-get install build-essential gcc
2. Go to your target installation directory (usually i put them in /usr/local), download the source file.
Continue reading Python – Install a Python2.5 on Ubuntu Lucid @ 2
Python – Install a Python2.5 on Ubuntu Lucid @ 1
A few months ago i was working on a Drupal CDN setup using the Drupal CDN module and File Conveyor written by Wim Leers. But i have some problems when running the File Conveyor. At first, i thought it is because Python version. Ubuntu 10.04 (Lucid) comes with Python 2.6 but i wanna run the File Conveyor in 2.5. (*Finally i found that the switching the Python version would not resolve the problem.)
There are 2 ways to install additional Python package.
By apt-get Continue reading Python – Install a Python2.5 on Ubuntu Lucid @ 1
PHP – PHP 5.3 Repository for CentOS from Webtatic.com
Webtatic.com provides its own repository. If you want to get the latest packages such as PHP and MySQL, you can consider adding it to your yum repo by the following steps.
1. Add the yum repository information
Continue reading PHP – PHP 5.3 Repository for CentOS from Webtatic.com
Linux – Add New User by Command Line
Use the following command to add user with default home folder and bash as default shell.
- useradd -m -s /bin/bash <username>
Done =)
Reference: Create new user account in Ubuntu Linux from command line
Linux – Add User to Group
Add secondary group to user.
- usermod -a -G <group name> <user name>
Ubuntu/Fedora – Disable Root SSH
For security reason, we’d better disable the root SSH access to server. Follow the steps below. (root privilege is needed)
1. Edit the SSH config file
- Ubuntu – vi /etc/ssh/sshd_config
- Fedora – vi /etc/sshd/sshd_config
Linux – Check File Encoding
The file command also works in Linux. But unlike Mac, u don’t need to have the -I parameter. Continue reading Linux – Check File Encoding
Eureka! 