The curl command can pass custom host headers using the -H option. For example, to pass a custom host header: curl -H “Host: customhost.com” https://example.com This is useful when testing or accessing websites that have multiple domain names pointing to the same IP address. The host header allows the server to determine which domain name … Read more
The speed of the ping and traceroute commands can be affected by a number of factors, including network congestion, distance to the target host, and routing issues. However, you can try the following methods to speed up their responses: Decrease the number of packets sent by using the -c option for ping and the -q … Read more
You can view the address space of a process in Linux using the pmap command. pmap is a tool that shows the memory usage of each process and its shared libraries, mapping information and the stack. Here’s an example of how to use pmap: # pmap PID Replace PID with the process ID of the … Read more
Go provides several ways to perform looping, including the for loop. Here are some examples of using the for loop in Go: Classic for loop: for i := 0; i < 10; i++ { fmt.Println(i) } This loop will start from 0, continue until i is less than 10, and increment i by 1 on … Read more
By default, WordPress does not allow shortcodes to be executed in excerpts. To enable shortcodes in WordPress excerpts, you need to add the following code to your theme’s functions.php file: add_filter(‘the_excerpt’, ‘do_shortcode’); This code adds a filter to the the_excerpt function, which runs the do_shortcode function on the excerpt before it is displayed. The do_shortcode … Read more
In FreeBSD, you can allow normal users to mount CDROMs, DVDs, and USB devices by adding them to the operator group. The operator group is automatically granted the ability to mount removable devices. To add a user to the operator group, use the pw utility as follows: sudo pw groupmod operator -m <username> Where <username> … Read more
You can check if the shell is interactive or not by checking the value of the -o option of the PS1 environment variable: if [ “${-#*i}” != “$-” ]; then echo “Interactive shell” else echo “Not an interactive shell” fi In this example, “${-#*i}” expands to the value of the $- variable with the first … Read more
To send the charset utf-8 with Nginx web server under Unix / Linux, you need to add the following code to your Nginx configuration file: http { # … add_header ‘Content-Type’ ‘text/html; charset=UTF-8’; # … } You can add this code inside the http block of your Nginx configuration file. This header will be sent … Read more
To disable the APC (Alternative PHP Cache) module in PHP command line scripts or cron scripts, you need to add the following code at the beginning of your script: <?php ini_set(‘apc.enabled’, 0); // rest of your script here ?> This sets the apc.enabled configuration option to 0 for the current script, disabling the APC module … Read more
Here are four Linux commands to view page fault statistics: vmstat – This is a versatile command that provides information on system resource utilization, including page faults. The vmstat command reports the number of page faults in the “faults” column. vmstat procs ———–memory———- —swap– —–io—- -system– ——cpu—– r b swpd free buff cache si so … Read more