inserting line??

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# 8  
Old 11-03-2007

The example of uvrakesh worked for me, but perhaps the older syntax is needed:
#!/usr/bin/env sh

# @(#) s1       Demonstrate sed insert (before) and append (after).

set -o nounset
echo " (Versions displayed by local command.)"
version >/dev/null 2>&1 && version bash sed

cat >data1 <<EOF

echo " Input data:"
cat data1

echo " Results from sed:"
sed '/three/i \
2.1 \
4a \
4.1 \
4.2' data1

# See man sed, "Insert text".

exit 0

% ./s1

 (Versions displayed by local command.)
GNU bash 2.05b.0
GNU sed version 4.1.2

 Input data:

 Results from sed:

If the file is small enough, then a script for ed will work well. The command sed streams the data (sed -> stream editor), whereas commands to ed may take advantage of re-visiting lines, addressing lines in the backward direction, etc. See man and info pages for details, and experiment ... cheers, drl
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