Postfix to allow Mail Relay from a Trusted IP Rumi, May 27, 2023 Make sure smtpd_recipient_restrictions has permit_mynetworks, something like this: smtpd_recipient_restrictions = permit_mynetworks,<more> This is the default, but if you have -o smtpd_recipient_restrictions=something on an smtpd line in master.cf then it will override main.cf setting. A sample configuration that worked for me is as below- smtp inet n – n – -… Continue Reading
Install phpSysInfo on Debian/Ubuntu Rumi, May 19, 2023 Log into the Debian/Ubuntu device Run the following commands in a terminal:# update repositories and install any available software updates sudo apt update sudo apt upgrade # install Apache HTTPD sudo apt install apache2 # install PHP components sudo apt install php7.3 php7.3-xml # download phpSysInfo wget https://github.com/phpsysinfo/phpsysinfo/archive/v3.3.2.zip # extract v3.3.2.zip sudo… Continue Reading
How to unlock openvpn users Rumi, May 17, 2023 Go to /usr/local/openvpn_as/scripts/ directory with root privileges. Reset all lockout policy lockouts now: ./sacli –key “vpn.server.lockout_policy.reset_time” –value “1” ConfigPut ./sacli start sleep 2 ./sacli –key “vpn.server.lockout_policy.reset_time” ConfigDel ./sacli start Continue Reading
Install ZFS on Ubuntu Rumi, May 17, 2023 Installing ZFS Filesystem on Ubuntu We will be using the command line Terminal application for the installation of the ZFS filesystem. To launch the command line Terminal, use the Ctrl+Alt+T keyboard shortcut. Now to install the ZFS filesystem on Ubuntu, issue the following command in Terminal: $ sudo apt install… Continue Reading
Enable Password based authenticaiton in OCI compute instance Rumi, May 13, 2023 If you want to use a password to access the SSH server, a solution for fixing the Permission denied error is to enable password login in the sshd_config file. To do this, open the file in a text editor. This example uses the nano editor: sudo nano /etc/ssh/sshd_config In the file, find… Continue Reading
Download using multiple session with Linux CLI tool – multipart download Rumi, May 1, 2023 Option-1: Aria2 apt-get install aria2 Usage: aria2c -x 16 [url] #where 16 is the number of connections Option-2: Axel apt-get install axel Usage: axel -n 5 url or with visual indicator- axel -a -n 5 [URL] Continue Reading
Creating a XEN guest and tidbids in CLI Rumi, April 7, 2023 INSTALLING A GUEST DOMAIN (“DOMU”) Now that the Xen hypervisor/Dom0 virtual machine is configured and up and running, it’s time to configure and create a DomU. Just like we did in the Debian 9 tutorial, we will now install and use the xen-tools package to automate the steps involved in creating a… Continue Reading
Cloudmin-GPL XEN on Debian 10 Rumi, April 7, 2023April 7, 2023 This article is inspired and prepared on the forked Cloudmin Xen script updated for Debian 10. However, the following procedures to be followed as precuationary before executing the updated script, which is available in this post in below section. PHASE-I Prepare Environment for XEN INSTALLING THE XEN HYPERVISOR AND HOST/CONTROL… Continue Reading
Reset Webmin Password Rumi, April 4, 2023 Open a terminal or command prompt on the server where Webmin is installed. Navigate to the Webmin installation directory. The default location is /usr/local/webmin cd /usr/local/webmin To change password run command:on RedHat distributions (i.e. Fedora, CentOS, Gentoo, etc.): /usr/libexec/webmin/changepass.pl /etc/webmin admin newPassword on Debian distributions (i.e. Debian, Ubunto, etc.): /usr/share/webmin/changepass.pl… Continue Reading
Disable Last Login Message on Linux using hushlogin Rumi, March 28, 2023 Single user To permanently suppress a Last Login message as per on user basis, create a hidden .hushlogin file inside a user’s home directory. For example to suppress a Last Login message for the linuxconfig user, we would run this command: $ sudo touch /home/linuxconfig/.hushlogin Similarly to suppress a Last Login message for the root user,… Continue Reading