Sed

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Usage

# swap out text (just use regex)
sed -i 's/hello/goodbye/' ${FILE}
 
# delete line 5
sed -i '5d' ${FILE}
 
# delete 2 lines, from line 5
sed -i '5,+2d' ${FILE}
 
# delete the matching line
sed -i '/test string/d' ${FILE}

Follow a search for a file

For example, while debugging a non-working GStreamer install:

LD_LIBRARY_PATH=/opt/gst/lib/ GST_PLUGIN_PATH=/opt/gst/lib/gstreamer-0.10/ /opt/strace /opt/gst/bin/gst-inspect 2>&1 |
  tee gst-inspect.out |
  grep -r ^open |
  sed -re 's#^(open\(")(([^"/]*/)*)([^"]*)(".* = )([-0-9]*)(.*)$#\4\t\6\t\1\2\4\5\6\7#' |
  sort
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