Recently I had to type a long password to an app, but it’s super complex that typing is a headache. Password was in my password manager on laptop I decided to transfer the password using QR codes and then copy it.
Generating a QR is nothing hard these days, tons of online services for this now, but the thing is, my data is sensitive. Online services are not an option.
I searched how to generate QR codes from terminal and found this cool app called “qrencode”. It should be on every major distro repository.
Most common syntax is this.
-o option let you set the output and it is a required parameter. You can
output to standard output by giving
-o the value
-l option is the
error correction level. Possible values are L, M Q, H and L is the lowest, H is
the heighest. M is medium, Q is higher than medium but lower than H.
-s is the
pixel size. Default is 3 but I prefer 6. Having pixel size 6 will generate large
Typing that command each time and opening the image is hard work. Let’s simplify the process. I wrote a shell function for this.
mktemp command will create a temporary file in the OS specific temporary
directory. In our case
/tmp. If that command is not available, search your
distro repos. It should be there. Then we output the qr in png form to that
temporary file and display it in
sxiv so the mobile phone can read it. When we
sxiv our qr png will also get deleted.
Now generating QR codes are as easy as this.
Don’t be skid. Peace.
Thanks for stopping by 💗