Comment/Uncomment all cron tab entries in one shot

Alex — Sun, 30 Mar 2008 12:40:34 +0000

Comment :

sed -i -e ‘/^[ ]*[0-9]/ s/^/#/g’ /var/spool/cron/mysql

Uncomment :

sed -i -e ‘/^#*[ ]*[0-9]/ s/^#*[ ]*//g’ /var/spool/cron/mysql

Commenting and Uncommeting read-only in my.cnf across multiple servers

Alex — Sun, 30 Mar 2008 12:19:51 +0000

For commenting the following snippets can be used :

sudo perl -i -p -e ‘ print “#” . ” ” if !/^#/ && /^read-only/; ‘ /etc/my.cnf

sed -i -e ’s/^read-only/#&/g’ cnf

For uncommenting you can use the following snippets :

sudo perl -i -p -e ’s/^#// if /^#/ && /read-only/; ‘ /etc/my.cnf

sed -i -e ’s/^#*read-only/read-only/g’ cnf