Sometimes you have to use SSH to get some jobs done in Linux! So what if you need to run multiple applications under SSH? Well the first solution is to open multiple SSH connections. Screen can make your life easier by letting you to have multiple windows on a single SSH session! But it’s not […]
Category Archives: Technology
Change SSH Port
Changing default SSH port can be one of the steps to improve security in Linux servers. By changing SSH port to something other than port 22 and using a proper firewall you may have a good result on minimizing brute-force attacks to SSH. To change SSH listening port you are required to edit /etc/ssh/sshd_config file. […]
Completely disable email on single cPanel Account
A week ago one of our clients account been compromised and the attacker used the server to blast emails. as a system administrator my task was to prevent any outgoing email from the account before I start to investigate the attack and remove any kind of scripts from the hosting account. Studying cPanel files made […]
Send mail test from SSH on cPanel server
To check whether the mail server is working properly in a cPanel server which is running Exim mail server from SSH you can use sendmail script which is located in /usr/lib/sendmail. run the command following with –v emailaddress switch! for example: /usr/lib/sendmail –v [email protected] [email protected] is the recepient email here! once you press enter the […]
Flush Windows DNS Cache
It always sucks when a client claims his website is not working fine and you have to pay the failure of the ISP. so in this case the first thing I’ve to ask them is to flush their DNS cache! to Flush DNS cache in Windows based systems Open CMD then type “ipconfig /flushdns” and […]