https://stackoverflow.com/questions/35252285/insert-text-with-sed-on-the-same-line-that-pattern-search sed 's/\blocalhost\b/& 192.168.25.50/' file
sed -i "/export TOP=/c export TOP="${TOP}"" *.sh
sed -i "/export TOP=/d" *.sh
sed -i "/export TOP=/i newline" *.sh
sed -i "/export TOP=/a newline" *.sh