Here are some ways
Take a snapshot of area selected by mouse after waiting for 2 seconds. If the output file already exists, it will be overwritten.
% sleep 2; import myimage.jpg
Take a snapshot of the entire monitor after waiting for 2 seconds. If the output file already exists, it will be overwritten.
% sleep 2; import -w root myimage.jpg
Press Print Screen button on the keyboard. For KDE users, this will bring up the ksnapshot program which is very good.
For gnome users http://tips.webdesign10.com/how-to-take-a-screenshot-with-ubuntu-linux lists many options.
To find out when I installed the dokuwiki package, I did
$ zgrep installed /var/log/dpkg.log* | grep dokuwiki | grep -v "half-installed" /var/log/dpkg.log.2.gz:2022-12-06 17:15:37 status installed dokuwiki:all 0.0.20220731.a-1
without the grep -v “half-installed” at the end, I was getting
raju@minion:~$ zgrep installed /var/log/dpkg.log* | grep dokuwiki /var/log/dpkg.log.2.gz:2022-12-06 17:15:33 status half-installed dokuwiki:all 0.0.20180422.a-2.1 /var/log/dpkg.log.2.gz:2022-12-06 17:15:37 status installed dokuwiki:all 0.0.20220731.a-1
Got this idea from https://www.cyberciti.biz/faq/debian-ubuntu-linux-find-package-installed-updated-date/
$ 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
Useful links:
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
Ref:- https://snarky.ca/how-virtual-environments-work/ → “Introducing microvenv” section → first paragraph