sed one liners
Insert character at beginning of line

Example: comment out all nfs entries in /etc/fstab

sed -i ‘/nfs/s/^/#/’ /etc/fstab

Uncomment out all nfs entries in /etc/fstab

sed -i ‘/nfs/s/^#//g’ /etc/fstab

Make a copy of a file, then substitue a string in the original

perl -i.orig2 -p -e ‘s/10.49.5.61/10.49.5.62/g’ /etc/fstab

Print contents of a file between lines 1 and 609

sed -n ‘1,609’p /var/log/tspulsemail.log > index.html

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