Change a string

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# 1  
Old 12-15-2007
Change a string

I have my.cnf file:

log-bin = mysql-bin
relay-log = relay-bin

If there is no "skip-slave-start", I want to add it.
Or uncomment if it presents and commented.
Could someone tell me how to implement this feature in the easiest way?
# 2  
Old 12-17-2007
try this shell script:
grep '^skip-slave-start' my.cnf >& /dev/null
if [ $? -ne 0 ] ; then
    echo "skip-slave-start is not turned on, so going to turn it on..."
    grep '^ *# *skip-slave-start' my.cnf >& /dev/null
    if [ $? -eq 0 ] ; then
    # skip-slave-start is commented
        sed -i 's/^ *# *skip-slave-start/skip-slave-start/' my.cnf
            # so uncommnt it
    # skip-slave-start is not present
        sed -i 's/\[mysqld\]/[mysqld]\nskip-level-start/' my.cnf
            # so add it in [mysqld] section
    echo "skip-slave-start was turned on"

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