Scott at 18:30, 4 February 2011

2011-02-04T18:30:30Z

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Apply edit command to file and sends to output:
<pre>
sed -e "<edit command>" <file> > <output>
</pre>

Apply all edit commands in sedfile:
<pre>
sed -f <sedfile> <file> > <output>
</pre>

Some basic edit commands:
<pre>
s/a/b/ substitute b for a
{range}d delete lines in range
</pre>

To append <code>.img</code> to the end of each line:
<pre>
sed -e "s/$/.img/" <file>
</pre>
or (if there is already a tab at the end of each line)
<pre>
sed -e "s/\t$/.img/" <file>
</pre>

To modify a file in-place, use the -i option:
<pre>
sed -e 's/\sgutsy/ hardy/g' -i /etc/apt/sources.list
</pre>

Sed - Revision history

Scott at 18:30, 4 February 2011