Using a tool called iftop we can monitor bandwidth usage via command line on Linux. But here we will create our own shell script to monitor bandwidth usage. The idea is to read rx_bytes and tx_bytes files inside /sys/class/net/[interface]/statistics/ folder. Create netspeed script in /usr/local/bin/ and copy and paste below script. Script content: Exit nano…
Virtualbox Open Source Edition can be installed using Software Manager in Linux Mint. But if you want to use USB feature in Virtualbox, you have to install the non-free version of Virtualbox. Below is step by step guide how to install Virtualbox 4.1 non-free version on Linux Mint: 1. Edit /etc/apt/sources.list 2. Add this repository…
Memcached is free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load. First of all, install memcached dan php5-memcached packages: and then make sure memcached is running with this command: Restart apache web server: Check php5-memcached module using…
I’m new to Virtualmin hosting control panel and I got this error message when login to webmail via https://domain.com:20000 This problem happens when Dovecot IMAP and POP3 service is not started. So I start the service and problem solved.
I found this error message after upgrading PHP 5.1.6 to 5.2.14 The problem happens when there is a mismatch version of php-mcrypt module with php installed in the server. You can check the version using this command line: To fix this error, we have to update php-mcrypt module:
Run the following command as root or using sudo: And then select your timezone from the prompts. After that UTC time and local time will be shown as in the following example:
Screen is a full-screen window manager that multiplexes a physical terminal between several processes (typically interactive shells). The same way tabbed browsing revolutionized the web experience, GNU Screen can do the same for your experience in the command line. Instead of opening up several terminal instances on your desktop or using those ugly GNOME/KDE-based tabs,…
Rsync is awesome tool for synchronize local files or directories with files and directories on remote server. Rsync is commonly used for data backup. For rsync installation you can read this article. Below is command line how to use rsync with ssh. You will be asked for a ssh password before rsync can start synchronizing….
We can use iptables, service, and chkconfig commands to enable and disable firewall in Centos. iptables is an administration tool for IPv4 packet filtering and NAT. service is a command to run a System V init script. It is used to save, stop, and start services. chkconfig command is used to update and query runlevel…
Swap file is used by operating system to increase performance. Below are step by step guides how to create swap file in GNU Linux operating system: First of all, we determine the size of the new swap file and multiple it by 1024 to determine the block size. For example, the block size of a…