find & chmod

1. Starting in current directory, find files or directories and change permissions
   • find . '(' -type f -exec chmod 644 {} ';' ')' \ -o '(' -type d -exec chmod 755 {} ';' ')'

find & replace

1. Starting in current directory, find all files and replace ab with space
   • find . -type f -prin0 | xargs -0 sed -i 's/\/ /g'
2. Another powerful solution is to install & learn rpl
   • dnf install rpl
   • man rpl