Concatenate and pass as parameter, bash

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Need to remove default gateway. For example, there is an IP 192.168.4.15 with default gateway 192.168.4.14. I connect to WLAN with gw 10.0.0.1 and after that I would like do remove previous gw.



 IFS='.' read -ra IPARR <<< "$IP"
 Gateway="$IPARR[0].$IPARR[1].$IPARR[2].14"
 ssh blah@$IP '/sbin/route -v del default gw $Gateway;'
 #ssh blah@$IP '/sbin/ip route delete $Gateway dev rndis0;'
 #ssh blah@$IP '/sbin/route -n'


Both ways don't work. However, it is possible to remove it if I ssh into machine. My guess is that something wrong with passing $Gateway variable. Any suggestions?






bash ssh command-line







share|improve this question























  • You're using the wrong quotes. '' prevent variable expansion.
    – muru
    Dec 30 '14 at 10:52







  • 1




    @muru, or with ssh it will mean that the variable will get expanded on the remote host rather than locally where the Gateway variable has been set.
    – Graeme
    Dec 30 '14 at 11:10










  • @Graeme Indeed.
    – muru
    Dec 30 '14 at 11:12










  • Thanks guys, I have been trying to figure out what is wrong for a few hours already.
    – mikedanylov
    Dec 30 '14 at 11:17










  • duplicate: stackoverflow.com/q/27703579/7552
    – glenn jackman
    Dec 30 '14 at 13:54














up vote
2
down vote

favorite
1












Need to remove default gateway. For example, there is an IP 192.168.4.15 with default gateway 192.168.4.14. I connect to WLAN with gw 10.0.0.1 and after that I would like do remove previous gw.



 IFS='.' read -ra IPARR <<< "$IP"
 Gateway="$IPARR[0].$IPARR[1].$IPARR[2].14"
 ssh blah@$IP '/sbin/route -v del default gw $Gateway;'
 #ssh blah@$IP '/sbin/ip route delete $Gateway dev rndis0;'
 #ssh blah@$IP '/sbin/route -n'


Both ways don't work. However, it is possible to remove it if I ssh into machine. My guess is that something wrong with passing $Gateway variable. Any suggestions?






bash ssh command-line







share|improve this question























  • You're using the wrong quotes. '' prevent variable expansion.
    – muru
    Dec 30 '14 at 10:52







  • 1




    @muru, or with ssh it will mean that the variable will get expanded on the remote host rather than locally where the Gateway variable has been set.
    – Graeme
    Dec 30 '14 at 11:10










  • @Graeme Indeed.
    – muru
    Dec 30 '14 at 11:12










  • Thanks guys, I have been trying to figure out what is wrong for a few hours already.
    – mikedanylov
    Dec 30 '14 at 11:17










  • duplicate: stackoverflow.com/q/27703579/7552
    – glenn jackman
    Dec 30 '14 at 13:54












up vote
2
down vote

favorite
1









up vote
2
down vote

favorite
1






1





Need to remove default gateway. For example, there is an IP 192.168.4.15 with default gateway 192.168.4.14. I connect to WLAN with gw 10.0.0.1 and after that I would like do remove previous gw.



 IFS='.' read -ra IPARR <<< "$IP"
 Gateway="$IPARR[0].$IPARR[1].$IPARR[2].14"
 ssh blah@$IP '/sbin/route -v del default gw $Gateway;'
 #ssh blah@$IP '/sbin/ip route delete $Gateway dev rndis0;'
 #ssh blah@$IP '/sbin/route -n'


Both ways don't work. However, it is possible to remove it if I ssh into machine. My guess is that something wrong with passing $Gateway variable. Any suggestions?






bash ssh command-line







share|improve this question















Need to remove default gateway. For example, there is an IP 192.168.4.15 with default gateway 192.168.4.14. I connect to WLAN with gw 10.0.0.1 and after that I would like do remove previous gw.



 IFS='.' read -ra IPARR <<< "$IP"
 Gateway="$IPARR[0].$IPARR[1].$IPARR[2].14"
 ssh blah@$IP '/sbin/route -v del default gw $Gateway;'
 #ssh blah@$IP '/sbin/ip route delete $Gateway dev rndis0;'
 #ssh blah@$IP '/sbin/route -n'


Both ways don't work. However, it is possible to remove it if I ssh into machine. My guess is that something wrong with passing $Gateway variable. Any suggestions?






bash ssh command-line




bash ssh command-line






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 20 at 22:27









Rui F Ribeiro

38.2k1475125




38.2k1475125










asked Dec 30 '14 at 10:48









mikedanylov

1314




1314











  • You're using the wrong quotes. '' prevent variable expansion.
    – muru
    Dec 30 '14 at 10:52







  • 1




    @muru, or with ssh it will mean that the variable will get expanded on the remote host rather than locally where the Gateway variable has been set.
    – Graeme
    Dec 30 '14 at 11:10










  • @Graeme Indeed.
    – muru
    Dec 30 '14 at 11:12










  • Thanks guys, I have been trying to figure out what is wrong for a few hours already.
    – mikedanylov
    Dec 30 '14 at 11:17










  • duplicate: stackoverflow.com/q/27703579/7552
    – glenn jackman
    Dec 30 '14 at 13:54
















  • You're using the wrong quotes. '' prevent variable expansion.
    – muru
    Dec 30 '14 at 10:52







  • 1




    @muru, or with ssh it will mean that the variable will get expanded on the remote host rather than locally where the Gateway variable has been set.
    – Graeme
    Dec 30 '14 at 11:10










  • @Graeme Indeed.
    – muru
    Dec 30 '14 at 11:12










  • Thanks guys, I have been trying to figure out what is wrong for a few hours already.
    – mikedanylov
    Dec 30 '14 at 11:17










  • duplicate: stackoverflow.com/q/27703579/7552
    – glenn jackman
    Dec 30 '14 at 13:54















You're using the wrong quotes. '' prevent variable expansion.
– muru
Dec 30 '14 at 10:52





You're using the wrong quotes. '' prevent variable expansion.
– muru
Dec 30 '14 at 10:52





1




1




@muru, or with ssh it will mean that the variable will get expanded on the remote host rather than locally where the Gateway variable has been set.
– Graeme
Dec 30 '14 at 11:10




@muru, or with ssh it will mean that the variable will get expanded on the remote host rather than locally where the Gateway variable has been set.
– Graeme
Dec 30 '14 at 11:10












@Graeme Indeed.
– muru
Dec 30 '14 at 11:12




@Graeme Indeed.
– muru
Dec 30 '14 at 11:12












Thanks guys, I have been trying to figure out what is wrong for a few hours already.
– mikedanylov
Dec 30 '14 at 11:17




Thanks guys, I have been trying to figure out what is wrong for a few hours already.
– mikedanylov
Dec 30 '14 at 11:17












duplicate: stackoverflow.com/q/27703579/7552
– glenn jackman
Dec 30 '14 at 13:54




duplicate: stackoverflow.com/q/27703579/7552
– glenn jackman
Dec 30 '14 at 13:54










1 Answer
1






active

oldest

votes

















up vote
2
down vote



accepted










So, the answer is to use double quotes when ssh'ing into machine:



ssh blah@$IP "/sbin/route -v del default gw $Gateway;"





share|improve this answer




















  • You should stop using obsolete commands, and start using ip instead: ssh blah@IP "/sbin/ip route del default via $Gateway"
    – MariusMatutiae
    Dec 30 '14 at 14:29










  • @MariusMatutiae, could you explain more what is the difference between route and ip route?
    – mikedanylov
    Dec 31 '14 at 8:42










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1 Answer
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active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
2
down vote



accepted










So, the answer is to use double quotes when ssh'ing into machine:



ssh blah@$IP "/sbin/route -v del default gw $Gateway;"





share|improve this answer




















  • You should stop using obsolete commands, and start using ip instead: ssh blah@IP "/sbin/ip route del default via $Gateway"
    – MariusMatutiae
    Dec 30 '14 at 14:29










  • @MariusMatutiae, could you explain more what is the difference between route and ip route?
    – mikedanylov
    Dec 31 '14 at 8:42














up vote
2
down vote



accepted










So, the answer is to use double quotes when ssh'ing into machine:



ssh blah@$IP "/sbin/route -v del default gw $Gateway;"





share|improve this answer




















  • You should stop using obsolete commands, and start using ip instead: ssh blah@IP "/sbin/ip route del default via $Gateway"
    – MariusMatutiae
    Dec 30 '14 at 14:29










  • @MariusMatutiae, could you explain more what is the difference between route and ip route?
    – mikedanylov
    Dec 31 '14 at 8:42












up vote
2
down vote



accepted







up vote
2
down vote



accepted






So, the answer is to use double quotes when ssh'ing into machine:



ssh blah@$IP "/sbin/route -v del default gw $Gateway;"





share|improve this answer












So, the answer is to use double quotes when ssh'ing into machine:



ssh blah@$IP "/sbin/route -v del default gw $Gateway;"






share|improve this answer












share|improve this answer



share|improve this answer










answered Dec 30 '14 at 11:27









mikedanylov

1314




1314











  • You should stop using obsolete commands, and start using ip instead: ssh blah@IP "/sbin/ip route del default via $Gateway"
    – MariusMatutiae
    Dec 30 '14 at 14:29










  • @MariusMatutiae, could you explain more what is the difference between route and ip route?
    – mikedanylov
    Dec 31 '14 at 8:42
















  • You should stop using obsolete commands, and start using ip instead: ssh blah@IP "/sbin/ip route del default via $Gateway"
    – MariusMatutiae
    Dec 30 '14 at 14:29










  • @MariusMatutiae, could you explain more what is the difference between route and ip route?
    – mikedanylov
    Dec 31 '14 at 8:42















You should stop using obsolete commands, and start using ip instead: ssh blah@IP "/sbin/ip route del default via $Gateway"
– MariusMatutiae
Dec 30 '14 at 14:29




You should stop using obsolete commands, and start using ip instead: ssh blah@IP "/sbin/ip route del default via $Gateway"
– MariusMatutiae
Dec 30 '14 at 14:29












@MariusMatutiae, could you explain more what is the difference between route and ip route?
– mikedanylov
Dec 31 '14 at 8:42




@MariusMatutiae, could you explain more what is the difference between route and ip route?
– mikedanylov
Dec 31 '14 at 8:42

















 

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