Shell Programming and Scripting

var1="replicate-ignore-db"
var2="replicate-same-server-id"
var3="skip-slave-start"
var4="report-host"
var5="master-host"
var6="master-user"
var7="master-password"
var8="master-port"
#code below deleted paramters as above if exists in my.cnf
for i in 1 2 3 4 5 6 7 8
do
        echo "`sed "/$var$i/d" my.cnf`" > my.cnf
done

#!/bin/bash
var1="replicate-ignore-db"
...
var8="master-port"
#code below deleted paramters as above if exists in my.cnf
for i in $(seq 1 8)
do
        val=$( eval eval echo \$var$i )
        sed -i "/$val/d" my.cnf
done

#code below adds the above paramters to my.cnf
no=28
for i in $(seq 1 8)
do
        no=`expr $no + 1`
        val2=$( eval eval echo \$variable$i )
        sed -i "$noi $val2" my.cnf
done

sed: -e expression #1, char 17: unterminated `s' command
sed: -e expression #1, char 3: extra characters after command
sed: -e expression #1, char 2: unknown command: `m'
sed: -e expression #1, char 2: unknown command: `m'
sed: -e expression #1, char 2: unknown command: `m'

...
sed -i "$no i $val2" my.cnf
...

...
sed -i "${no}i $val2" my.cnf
...