Changing Username on Debian sysvinit or systemd

Sometimes we feel there is a need to change our username on the GNU/Linux for many different reason. It may be easy or difficult depending on your approach.

The easy way out is to boot into recovery as a 'admin priviledged' user and use 'usermod' and 'groupmod' command:

1) usermod -l newusername oldusername
2) groupmod -n newusername oldusername
3) usermod -d /home/newusername -m newusername

The difficult way (or rather more tedious approach) is to use 'vipw' command:
1) vipw -p (replace "oldusername" with "newusername" and "/home/oldusername" with "/home/newusername")
2) vipw -s (replace "oldusername" with "newusername")
3) vigr -g (replace all entries "oldusername" with "newusername")
4) vigr -s (replace all entries "oldusername" with "newusername")

Comments

Repairing Fedora Grub using Fedora Live USB

First, Prepare the Fedora Workstation Live CD using Fedora Media Writer. Next, run the Workstation Live CD and run the console. Then, enter the following commands if you are running the separate boot and root partition: 1) sudo mount /dev/sdaX /mnt Note: sdaX is the root partition 2) sudo mount /dev/sdaW /mnt/boot Note: sdaW is the boot partition The following files are essential for running the essential processes for repairing grub and shall be mounted: 3) sudo mount --bind /dev /mnt/dev 4) sudo mount --bind /proc /mnt/proc 5) sudo mount --bind /sys /mnt/sys 6) sudo mount --bind /var/run /mnt/var/run Now, you are ready to go into the Fedora partitions to repair the grub files. The path should be changed to root user from liveuser> to root>: 7) sudo chroot /mnt If you are running dual boot Windows and Fedora system, the following command will replace the Metro Interface: 8) grub2-install /dev/sda With a dual-boot or multi-boot systems, the follow

Installing SUSE Imagewriter on Linux Mint Debian Edition

The original title for this post is "Installing SUSE Imagewriter on Ubuntu LTS". Download Zip, save to preferred directory:~/Downloads However due to data loss of the blog, i decide to rewrite this article using Linux Mint Debian Editi on ( a similar distribution to Ubuntu ). First we have to download the source from Github (https://github.com/openSUSE/imagewriter) Download ZIP, save to preferred directory: ~/Downloads Extract imagewriter-master.zip in /home/username/Downloads and in terminal run the command: cd /home/username/Downloads/imagewriter-master Install the latest version of qt4-qmake and libqt4-dev by running: sudo apt-get update && sudo apt-get install qt4-qmake libqt4-dev Instructions for Linux Installation on github Follow the instructions in README.md by running the command: qmake DEFINES=USEHAL imagewriter.pro Follow by the command: qmake DEFINES=USEUDISKS imagewriter.pro Next run the command: qmake DEFINE

Fixing time on sysvinit and systemd

If you have a system that boot using different GNU/Linux init systems such as sysvinit (aka System 5) and systemd (aka System 500) in addition to proprietary Windows system, you may face incorrect time display on one of the aforementioned system. The difference in time display is dependent on the time difference of your location and the UTC time. Further complication may result from concept like Daylight Saving Time (DST). If the Bios is set to localtime, you may fix it in systemd boot system using 'timedatectl' command like: sudo timedatectl set-local-rtc 1 However, if you are using sysvinit and Bios is using localtime, you can set inform the system that local time is being used using 'hwclock' command like: sudo hwclock --localtime or to synchronize the hardware clock with system time and inform the system using: sudo hwclock --systohc --localtime If Bios is using UTC time, you may revert the change with 'timedatectl' like: sudo timedatectl set-lo

Linux Consumer

Search This Blog