You can create a custom 503 maintenance page in Nginx by using the error_page directive and creating a custom error page. Here’s an example of how you can create a custom 503 maintenance page in Nginx: Create a custom error page file with the desired content, for example 503.html. Place it in the root directory … Read more
You can block access to a specific port in Linux using the iptables command. Here’s an example of how you can block access to port 22 (which is used for SSH access) with iptables: iptables -A INPUT -p tcp –dport 22 -j DROP This will add a new rule to the INPUT chain, which specifies … Read more
You can use mplayer to play MP3 files from a playlist file in Linux or Unix. To do this, you’ll need to create a playlist file that contains the list of MP3 files that you want to play. Here’s an example of how you can create a playlist file: # Create a file named “playlist.m3u” … Read more
If you have a MediaWiki installation in a shared hosting environment or behind a proxy, you may encounter issues with internal server host names and redirection. Here are some steps you can take to resolve these issues: Modify the $wgServer setting in your LocalSettings.php file: $wgServer = “http://your.server.name”; This should be set to the fully … Read more
Here is a basic script in bash for looping through the contents of a file using a while loop: #!/bin/bash # specify the file you want to read filename=”file.txt” # open the file using a file descriptor # the -r option is to read the file exec 3<&0 exec 0<$filename # while loop to read … Read more
In a Linux or Unix shell, you can create an infinite loop using the while loop. The syntax for the while loop is as follows: while true; do [command1] [command2] … done Here, true is a command that always returns a successful exit status (0), so the loop will continue to execute indefinitely until it … Read more
In OpenBSD, you can see information about the PCI devices on your system by using the “pcictl” command. This command provides information about the PCI buses, PCI devices, and PCI functions present on the system. To display information about all PCI devices on the system, run the following command: pcictl dump You can also display … Read more
To disable a user account on Linux, you can use the usermod command. The usermod command allows you to modify the attributes of a user account. To disable a user account, you can add the -L option to the usermod command. For example, to disable the user account named user1, you would run the following … Read more
To manage the Nginx web server on Ubuntu Linux, you can use the following commands: Start Nginx: sudo service nginx start Restart Nginx: sudo service nginx restart Stop Nginx: sudo service nginx stop Note that these commands require root privileges, so you’ll need to use sudo to run them.
The “SIOCADDRT: File exists” error message in Ubuntu (and other Linux distributions) occurs when you try to add a route to the system routing table that already exists. This error message indicates that the system is unable to add the new route because it conflicts with an existing route. To resolve this issue, you can … Read more