# Emit tab in shell format: %x09 # Double tabs: %x09%x09 # last 10 commands used history 10 # Following changes of a file tail -200f test_file.txt # Find file find . -type f -name *.xml | xargs grep 123456 # List txt-files in folder ls *.txt # Hard stop process kill -9 <process_code> # Indent xml file and output to new file cat input.xml | xmllint --format - >> formatted_output.xml