Scan image to pdf

scanimage --resolution 300  --format tiff >xxx.tif
convert xxx.tif /tmp/fileName-01.pdf

Scan image to pdf in 1 command

scanimage -p --resolution 600 --mode Gray   -x 215.9 -y 279.4 | pnmtops -imageheight 11 -imagewidth 8.5 | ps2pdf - output.pdf

Lists last 3 pdf in a directory, copy 1st page from a pdf and copies the page to the output directory

ls *.pdf -tr | tail -n 3 | while read -r a; do pdftk $a cat 1 output ~/Dropbox/Ucetnictvi/2022/kahle/03/pf/$a; done

Copy file to remote host using ssh

scp localfile.csv  pavel@hostname:/tmp/

Scan for computers in network

sudo nmap -sS -p 22 192.168.1.0/24 | grep "Nmap scan"

Search files containning x

grep -A 1 -B 1 --exclude-dir=.* "x" ./.*

Search class in jars

find . -name "*.jar" | xargs grep X.class