• -e is neat, but too much work
• changes can be put in a file!
• ls -al | sed -f ./sample.sed
• then, you can schedule it, if you like....
• Replace a line with specific text:
  ls -al | sed -e '/swp$/c\TEMPORARY FILE'
• ls -al | sed -e'/html$/s/rw-r--r--/644/'
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