How to find out the previous kernel version on CentOS after a reboot

To find out the previous kernel version on CentOS after a reboot, you can use the rpm command to query the package database. Here are the steps:

Open a terminal or SSH session to your CentOS server.

Type the following command to list all installed kernels:

rpm -qa | grep "kernel-[0-9]"

This will output a list of all installed kernel packages.… Read the rest

How to fix /var/log/maillog log file that stuck writing

If the /var/log/maillog file is stuck writing, restarting the rsyslog service may help in resolving the issue.

service rsyslog restart

However, it is important to understand the potential impact of restarting the rsyslog service, as it can affect the logging for other services running on the server.… Read the rest

Magento how to check whether SSL redirection is enabled using MySQL command line and disable it if needed

To check whether SSL redirection is enabled or disabled in Magento using MySQL command line, you can execute the following SQL query:

SELECT * FROM core_config_data WHERE path LIKE '%web/secure/use_rewrites%';

If the value of the value column is set to 1, then SSL redirection is enabled.… Read the rest

How to know Magento version via the command line?

To find out the version of Magento installed on your system via the command line, you can use the following command in the Magento root directory:

php bin/magento --version

or

grep -A6 'static function getVersionInfo' app/Mage.php

From a browser you may try to reach the following page:

https://yourwebsite/magento_version

This will display the version number of Magento installed on your system.… Read the rest

How to increase the view limit of PureFTP on cPanel using whmapi1

The default cPanel limit is 10000

cat /etc/pure-ftpd.conf |grep LimitRecursion

LimitRecursion 10000 8

# ‘ls’ recursion limits. The first argument is the maximum number of
# files to be displayed. The second one is the max subdirectories depth

To increase the view limit of PureFTP on cPanel using whmapi1, you can follow these steps:

– Log in to your server via SSH using the root user.… Read the rest

How to deal with malicious kcached processes

If you find something like below on your server, be sure you’ve detected malicious activity

username 2156075 0.0 0.0 2848 2660 ? Ss Feb09 0:00 [kcached]
username 2156076 0.0 0.0 2852 2660 ? S Feb09 0:01 \_ [kcached]

You can use the lsof command to determine which processes have the files open and whether they are being used for legitimate purposes.… Read the rest