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HTTPD on Redhat & Centos

Here are the commands to start, stop and enable Apache on RHEL and CentOS.

Enable on bootup.

systemctl enable httpd

Get status

systemctl status httpd

Start

systemctl start httpd

Stop

systemctl stop httpd

Restart

systemctl restart httpd

EFS Encryption

If you have an existing EFS that’s unencrypted, you can encrypt it be creating a snapshot using AWS Backup, and then restoring the file system to a new EFS with encryption. If you choose to restore in a directory in the same file system, it will not be encrypted. It has to be a new EFS. In addition, you’ll be asked to select which encryption key to use. The default key will work, unless you have your own.

Add Existing User To A Group

Here’s how to add an existing user to a user group in Linux.

usermod -a -G groupname username
usermod -a -G www-data john

List all users belonging to a group.

lid -g www-data

List all the groups the user belongs to.

groups john