Extract specific file from tar archive

$ tar -xzvf {tarball.tar.gz} {path/to/file}

Find symbolic links recursively under a folder

ls -lR /path/to/folder | grep ^l

Copy specific file types keeping folder hierarchy*

find . -name '*.txt' -exec cp --parents \{** /target \;

Copy files with folder hierarchy

cp --parents src/prog.js images/icon.jpg /tmp/package

Bash get Nth field/column with awk

echo "a:b:c" | awk -F ":" '{print $2}'

if -F delemeter param is not given, input is seperated by spaces

Get Nth field from end

$ echo "aa:bb:cc:dd:ee:ff:String Test" | awk -F ":" '{print $(NF -0)}'  
String Test

Remove chars from filename

for file in *; do mv "${file}" "${file/000/}"; done

This will remove 000 from all the filenames in folder. * can be substituted
with / or more for files in subfolders.

Convert host list into whitespace seperated list

for host in `cat a | grep -o '[a-z].*domain.com'`; do echo -n "$host "; done

Print specific json fields on a file

jq -r '.status' response.json

status is the name of the json field here without ".**

Write file with cat EOF

$ cat < print.sh  
#!/bin/bash  
echo \$PWD  
echo $PWD  
EOF

ref - https://stackoverflow.com/questions/2500436/how-does-cat-eof-work-in-
bash