To setup default kernel in Linux(Fedora)

 

To setup default kernel in Linux(Fedora):

$ sudo grubby --info=ALL | grep -E "^kernel|^index"
index=0
kernel="/boot/vmlinuz-6.5.5-200.fc38.x86_64"
index=1
kernel="/boot/vmlinuz-6.2.15-100.fc36.x86_64"
index=2
kernel="/boot/vmlinuz-5.17.12-100.fc34.x86_64"
index=3
kernel="/boot/vmlinuz-0-rescue-eeca1c676989405b94bedc847e363048"
index=4
kernel="/boot/memtest86+x64.bin"

$ sudo grubby --default-kernel
// this displays the default kernel in your system.

$ sudo grubby --default-title
// this displays the default title

$ sudo grubby --default-index
// this displays the default index.

==

$ sudo grubby --set-default-index=2
The default is /boot/loader/entries/eeca1c676989405b94bedc847e363048-5.17.12-100.fc34.x86_64.conf with index 2 and kernel /boot/vmlinuz-5.17.12-100.fc34.x86_64

$ sudo grubby --default-title
Fedora (5.17.12-100.fc34.x86_64) 34 (Workstation Edition)
 

 

 

Software version and end-of-life info.

Software version information

"End-of-life (EOL) and support information is often hard to track, or very badly presented. endoflife.date documents EOL dates and support lifecycles for various products."

https://endoflife.date/

For eg, kubernetes related info. here :

https://endoflife.date/kubernetes

 

Getting 2FA codes in desktop (and avoid your mobile)

 

Oftentimes I need to pickup my mobile to get the 2FA codes for different accounts.

There should be a simple solution to get 2FA in your desktop.
It is authenticator.cc  & it is open source :) :)

--

Open your mobile and open google authenticator app.  (You may have different app).
Click on export and select the accounts you want to export.
On clicking next, it shows a QR code. 

Screenshot the QR code and send it to yourself (like email/Whatsapp).
--

Now it is the time to get 2FA authenticator codes in your desktop browser.
Visit authenticator.cc and install the addon (in your browser like chrome, firefox, edge)

Click on the addon installed and then click on scan. It will ask for access to all the websites.
For time being give this permission. Now, scan the QR code obtained from above.

That's it, you'll have all QR codes availble in your desktop.

No need to grab the mobile to get 2FA codes.


Note: Remove the permission given (to access all data) using "manage addon".

--

 

 

Command to find which rpm installed the config/binary file

 

--

yum whatprovides /usr/bin/virsh

 =>outputs which package provides the binary virsh.

-- 

if you don’t know the path , use : 

yum whatprovides */virsh

 --

git log with file details

 

--

For full path names of changed files:

git log --author=<user_mail_id>   --name-only

--

For full path names and status of changed files:

git log --author=<user_mail_id>   --name-status

-- 

For abbreviated pathnames and a diffstat of changed files:

git log --author=<user_mail_id> --stat

--

source:
https://stackoverflow.com/questions/1230084/how-to-have-git-log-show-filenames-like-svn-log-v