Dev {Tricks}

You are here: Home / Archives for Server and Hosting

by

How to change the SSH port 22

How to change the SSH port

  • Log in to your server using the current SSH port (default 22).
    Note that you should not close this SSH connection until you have verified that you can access SSH on the new port number.
  • Open / etc/ssh/sshd_config
vi /etc/ssh/sshd_config
  • Set your Port. For example 1234
Port 1234
  • Restart SSHD
/scripts/restartsrv_sshd

or

sudo systemctl restart ssh.service
  • Configure any firewalls with the new SSH port.
  • Test SSH with new port 1234
ssh USER@HOSTNAME -p1234

Use your USER and HOSTNAME and the password and confirm new port.

If the SSH test on the new port is successful you can close the connection. If it is not successful, this SSH connection should not be closed until the SSH test on the new port is successful. Else revert the port to previous state and restart.

find / -name “sshd_config” -print

/usr/share/openssh/sshd_config
/etc/ssh/sshd_config

find / -name “sshd_config” 2>/dev/null

vi /usr/share/openssh/sshd_config

vi /etc/nftables.conf

ufw allow 1234/tcp

vi /etc/services

systemctl restart ssh

service ssh restart

systemctl restart ssh.service

ssh root@server_ip -p NEW_PORT
ssh root@123.512.11.6 -p 1234

 

 

by

Ways To Keep Your VPS Secure | Checklist

  • Change the default SSH 22 port
  • Use strong password
  • Using SSH key authentication instead of password authentication
  • Use The Latest Software Versions
  • Monitor Your VPS Server Logs
  • Set up email notifications for any warnings and errors
  • Set Up Your Firewall
  • Make Sure Your Server Is Malware-protected
  • Protect Against Brute-force Attacks
  • Use SSL Certificates For Everything

by

Solved: Can’t save module, exceeds limits | Joomla

  • Save failed with the following error the content exceeds allowed limits
  • Can’t save module, exceeds limits

Solution

The error message is triggered by the size limit of the text that can be stored into the column ‘content’ in the modules table. The text limit is 65535 in the MySQL database.

  • Login to your hosting panel (For example cPanel, Plesk, DirectAdmin, CWP etc.)
  • Now open your database in phpMyAdmin
  • Check the definition of the column ‘content’ and it should be ‘text’ and we have to make it ‘mediumtext’.

That’s all!

If not solved, please change Default editor to TinyMCE.

by

Fix read only fstab

  • “/ etc/fstab” [readonly]
  • can’t edit fstab read only
  • file ‘/ etc/fstab’ is unwritable
  • Repairing fstab (read only /)

If / etc/fstab is correct, you can simply type:

mount -n -o remount /

But if / etc/fstab is wrong, the device name and possibly the type must have to be given too: e.g.

mount -n -o remount -t extX /dev/sdaX /

Where,
extX is your filesystem type
/dev/sdaX is the partition you want to mount

To see all your available partitions just type ls /dev/[sh]d*.