$ pdfimages -list deptest.pdf

Ref:- https://askubuntu.com/questions/760993/how-to-programmatically-determine-dpi-of-images-in-pdf-file

snippet 1:

convert *.jpg file.pdf

snippet 2:

 % cat combine_pics.sh 
#! /usr/bin/env bash

script_dir=`dirname "$0"`
cd $script_dir/bin
convert `ls -v individual_pics/*.jpeg` all_pics_combined.pdf

Ref:- https://stackoverflow.com/questions/13618236/merge-multiple-jpg-into-single-pdf-in-linux

Use axi-cache instead of apt-cache

axi-cache search term tag

For example

 % axi-cache search scanner suite::kde
2 results found.
Results 1-2:
100% skanlite - image scanner based on the KSane backend
68% skanlite:i386 - image scanner based on the KSane backend
More terms: ksane skanlite backend image based attached scanning
More tags: hardware::scanner works-with-format::png works-with-format::jpg use::scanning works-with::image:raster works-with::image scope::application

If we are using apt-cache, it would not be possible to “discover” skanlite unless we know the right set of keywords. For example, searching for 'scanner' and 'kde' would not have told us about skanlite package.

 % apt-cache search scanner kde
clamtk - graphical front-end for ClamAV
libkf5sane-data - scanner library (data files)
libkf5sane-dev - scanner library development headers
libkf5sane5 - scanner library (runtime)

Ref:- https://debian-handbook.info/browse/stable/sect.apt-cache.html

• https://release.debian.org/bullseye/freeze_policy.html
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=981424 - blocker to upgrade from buster to bullseye

Useful links:

• https://bugs.debian.org/release-critical/other/testing.html - Shows the number of release critical bugs that are affecting testing
• https://bugs.debian.org/release-critical/ - Shows how many release critical are there that affect next release
• https://www.debian.org/releases/testing/ - contains a link to release-critical bugs

Use

lsb_release -cs

Sample run

 % lsb_release -cs
buster

Ref:- I came across it in https://www.texmacs.org/tmweb/download/linux-repos.en.html#debian