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Category: Administrations

Running react js on virtualmin server

Rumi, November 21, 2024November 22, 2024

Just make sure, you have node, npm andp m2 installed in the server as root administrator. Now, you can run the rest as a virtualmin user in the virtualmin shell account. npm install npm run build npm run dev pm2 start npm — run dev Step-3 will let you know…

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Disable NetworkManager in Rocky Linux 8

Rumi, November 8, 2024

To disable NetworkManager on Rocky Linux 8, we need to install the network-scripts package which provides legacy support to the network service, yum install network-scripts Enable the service to start onboot, systemctl enable network Next, we add NM_Controlled=no to the interface config file, nano /etc/sysconfig/network-scripts/ifcfg-<interface> Replace with the interface name…

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How to Find all Files Containing Specific Text (string) on Linux

Rumi, November 8, 2024November 8, 2024

Method 1: grep command grep command in Linux that is used to search for files containing a specific text or string. By default, it shows us the lines in the files that contain the particular text. If we append the -l option to it, the command will show us all…

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Auto-renew Let’s Encrypt SSL certificates using crontab

Rumi, November 8, 2024

The achieve this, all we need to do is add a new crontab which will trigger the certbot at a certain time in a day to check the expiry date of your SSL certificates and take care of the renewing it. 1. Configure the crontab (Make sure to use sudo so that root crontab can be…

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Enable vnc on Kali Linux

Rumi, September 8, 2024

No Persistent mode: apt-get update && upgrade apt-get install x11vnc x11vnc -storepasswd x11vnc -ncache 10 -auth guess -nap -forever -loop -repeat -rfbauth /root/.vnc/passwd -rfbport 5900 -noncache Persistent mode: Step:01 Go to the below path cd /usr/local/bin Step:02 and create the file nano sharex11vnc

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Enable Serial Terminal on Debain using Grub Configuration (Grub2)

Rumi, September 7, 2024

Edit /etc/default/grub, enter: # vi /etc/default/grub Append / modify as follows: GRUB_CMDLINE_LINUX=’console=tty0 console=ttyS0,19200n8′ GRUB_TERMINAL=serial GRUB_SERIAL_COMMAND=”serial –speed=19200 –unit=0 –word=8 –parity=no –stop=1″ Save and close the file. Next run the following command to generate a grub2 config file /boot/grub/grub.cfg : # update-grub Ref: https://www.cyberciti.biz/faq/howto-setup-serial-console-on-debian-linux/

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Add serial console boot for Opensuse 15.5

Rumi, September 6, 2024

While it works with UEFI boot using “legacy BIOS” the serial console works after grub has prompted the boot menu. But this might be too late e.g. in special cases like encrypted disk where grub needs to request the password. KVM Guest has already been changed for serial support as…

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Serial Terminal Configuration in RHEL Distribution

Rumi, September 5, 2024

Serial Terminal Configuration in RHEL 7 Add, or update if already present, the following lines to /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT=”console=tty0 console=ttyS0,115200n8″ GRUB_TERMINAL=serial GRUB_SERIAL_COMMAND=”serial –speed=115200 –unit=0 –word=8 –parity=no –stop=1″ GRUB_CMDLINE_LINUX_DEFAULT applies this configuration only to the default menu entry, use GRUB_CMDLINE_LINUX to apply it to all the menu entries. NOTE: each line type…

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Preparing Cloud-Init Templates

Rumi, September 3, 2024

The first step is to prepare your VM. Basically you can use any VM. Simply install the Cloud-Init packages inside the VM that you want to prepare. On Debian/Ubuntu based systems this is as simple as: apt-get install cloud-init This command is not intended to be executed on the Proxmox…

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Install qemu-guest-agent on Opensuse 15.5

Rumi, August 26, 2024

Add repository and install manually For openSUSE Tumbleweed run the following as root: zypper addrepo https://download.opensuse.org/repositories/Virtualization/openSUSE_Tumbleweed/Virtualization.repo zypper refresh zypper install qemu-guest-agent For 15.6 run the following as root: zypper addrepo https://download.opensuse.org/repositories/Virtualization/15.6/Virtualization.repo zypper refresh zypper install qemu-guest-agent For 15.5 run the following as root: zypper addrepo https://download.opensuse.org/repositories/Virtualization/15.5/Virtualization.repo zypper refresh zypper install…

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Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Savvyfrom Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & PKI Naitonal Root and CA Infrastructure. Also engaged with several Offshore Software Development Team.

Worked with Orascom Telecom-Banglalink, Network Elites as VAS partner, BTRC, BTT (Turkey) , Mango Teleservices Limited and Access to Informaiton (A2I-UNDP)

Currently working at Oracle Corporation as Principal Technology Solution and Cloud Architect.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

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