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No & does move the job to next line

I think you can run your first process in background by putting & at the end of the command and then run rm command.

I think you want var[$i]="$LINE" Also note the lack of spaces around the equal sign.

But without knowing your system and shell it's difficult to be sure. What are they?

perl -p0e 's/<!-- The custom module to do the authentication for LDAP.*<\/authentication>\n//s' file.xml

awk '/<falsemodule-option>/{p++} /<falsemodule-option>/ && p==1 {$0="<LdapLogin>\n"$0}1'

sed '0,/<falsemodule-option>/ {
/<falsemodule-option>/a\<LdapLogin>
}' file


awk is also a good way to try:

awk '/<falsemodule-option>/{p++} /<falsemodule-option>/ && p==1 {$0=...

@Scrutinizer In both cases the above syntax will only work with bash.
In unix "Posix" shells there is no "==" operator.
I agree that the "case" solution is the best.

You need spaces around the square brackets and you need weak quotes around the variables. Try this:
if [ "$connect" = n -o "$connect" = N -o "$connect" = no -o "$connect" = No -o "$connect" = NO ];...

if [ "$connect" = n ] || [ "$connect" = N ] ; then
...
fi

case $connect in
N|n ) ... ;;
esac

if [ "$connect" == 'n' -o "$connect" == 'N' ]

Use elif:

if [ "$x" = y ]
then
: do y
elif [ "$x" = n ]
then
: do n
elif [ "$x" = q ]
then
: do q
fi
or a case statement:

case $x in
y) : do y
;;
n) : do...

ip=xxx
port=yyy
sed '35,40{s/\(.*:\/\/\)\([0-9].[0-9].[0-9].[0-9]\):\([0-9]\{3\}\)\(.*\)/\1'$ip':'$port'\4/}' xml

Have you considered using an rsa key pair and authorized_keys file?

On the machine you are logging in from, cd to the home directory of the user you will be logging into the server as. Once you...

You can write a CGI script that puts out a form if called without arguments but for a post response it calls your script with the form values and gets some sort of status or report to send back to...

You could ssh a tunnel and wget locally, assuming you cannot wget directly. You can even leave the ssh tunnels to all of them up on different adjacent local high ports, and just increment the port.

There's a space missing:
...root@${a[i]}'wget http://$ip/admBuilds/vADM_$build/RPMs/InSightUpdate-$rn.upd'
...root@${a[i]} 'wget http://$ip/admBuilds/vADM_$build/RPMs/InSightUpdate-$rn.upd'

Maybe you need to setup the environment more, like thisssh him@there '. ./.profile ; wget whatever'