These articles discuss Linux-related topics that may arise as you develop or administer your web site.
The shebang is a line in a script file that specifies which program should run the script. Using the correct shebang is especially important for CGI script files.
The inode count represents the total number of files and directories in an account or on a disk. This article shows you how to determine the inode count for your account.
Learn how to determine where your account is using the most disk space.
You can use the screen program to open multiple text windows within a single SSH session. If you frequently work from the command line, particularly over an unstable internet connection, screen is a valuable addition to your toolbox.
The top and atop commands enable you to monitor resource usage for your account in real-time from the command line. Learn how to use them here.
The rsync program allows you to easily synchronize directories between two locations. For example, one common use of rsync is to create a backup. Learn how to use rsync here.
You can use the cURL program to transfer files to your account from the command line. The cURL program is often a good substitute for the wget program.
By default, cron sends e-mail notifications when it runs a cron job. This article shows how to disable this behavior.
ImageMagick is a powerful suite of programs that are used to manipulate image files. Learn more here.
By default, A2 Hosting's servers use the US Eastern Standard Time (EST) time zone. This article shows how to configure your shell account to use a different time zone.
This article only applies to shared hosting and reseller accounts. For server performance and stability reasons, cron jobs with intervals less than 15 minutes are reset to 15-minute intervals automatically.
You can use APF to help secure your VPS or dedicated server. Learn more here.
The iptables program enables you to set up a firewall and help secure your server. Please note that this article only applies to unmanaged hosting packages.
Learn how to set the default text editor for the Linux command-line environment.
Learn how to determine the correct amount of free and used memory on a server.
Learn how to generate checksums for your files and verify their integrity.
The Extra Packages for Enterprise Linux (EPEL) repository contains many additional useful packages for CentOS. Learn how to install this repository on your unmanaged server.
You may want to run a script or application in a cron job automatically after a server reboots. This article shows you how.
This article discusses how to view and interpret system load averages.