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I have this following script but i need to get $i variable value working inside that each block starting with EOF and ending with EOF.

its not reading the variable value but putting $i

/var/tmp/vpn.sh i have:

#!/bin/bash

amazonEth0="10.0.0.18"

amazonWan0="4.9.2.9"

vpnServer="4.8.8.6"

hosttoHost1="10.109.0.20/32"

hosttoHost2="10.109.0.21/32"

hosttoHost3="10.109.58.6/32"

hosttoHost4="10.109.59.3/32"

for i in 1 2 3 4

do

cat > /tmp/test$i.conf << \EOF

#Step 3

conn test"$i"

    #auto=start

    type=tunnel

    authby=secret

    pfs=no

    aggrmode=no

    ikelifetime=28800s

    lifetime=3600s

    ike=aes128-md5;modp1024!

    phase2alg=aes128-md5;modp1024

    forceencaps=yes

    left=$amazonLan0

    leftid=$amazonWan0

    leftsourceip=$amazonWan0

    right=$vpnServer

    rightsubnet=$hosttoHost$i

EOF

done

### Run me

cat > /var/tmp/vpn.sh << \EOF

service ipsec restart

######## Apply for loop here, instead of many many lines ###########

# for i in 1 2 3 4

# do

#   ipsec auto --add test$i

# done

ipsec auto --add test1

ipsec auto --add test2

ipsec auto --add test3

ipsec auto --add test4

######## Apply for loop here, instead of many many lines ###########

# for i in 1 2 3 4

# do

#   ipsec auto --up test$i

# done

ipsec auto --up test1

ipsec auto --up test2

ipsec auto --up test3

ipsec auto --up test4

ipsec auto --status

ip xfrm policy

ip route show

######## Apply for loop here, instead of many many lines ###########

# for i in 1 2 3 4

# do

#   ping -c 1 $hosttoHost$i

# done

ping -c 1 10.109.0.20; 

ping -c 1 10.109.0.21;

ping -c 1 10.109.58.6; 

ping -c 1 10.109.59.3; 

EOF

chmod +x /var/tmp/vpn.sh

# Cake - eat now - optional 

/var/tmp/vpn.sh > save output | mail -s ipsec date time &

1 Answer

0 votes
by (18.5k points)

Try the following steps:

1. You will have to remove the backslash before EOF as shown below:

#!/bin/bash

i=ok

# This prints "Bwah ok"

cat <<EOF

Bwah $i

EOF

# This prints "Bwah $i"

cat <<\EOF

Bwah $i

EOF

2. To get your last line display: rightsubnet="10.109.0.20/32" for i=1:

i=1

val1=beep

val2=bop

rightval="val$i"

cat <<EOF

This is a beep: ${!rightval}

EOF

3. Or you can just use an array as shown below:

i=0

vals=(beep bop)

cat <<EOF

This is a beep: ${vals[$i]}

EOF

Note: Index starts with 0

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