Open GNS3 Router Consoles in Multiple Tabs in a Single Window [GNOME]

As a follow up to my previous post of the above topic, I finally put together a script. I have two scripts, one specifically written for the Internetworkexpert Dynamips topology. The second one can will log into any topology – it takes the name of the .net file as an argument for example:


Just copy this code, put them in a file with the .sh extension and  make then run them from a command line AFTER you have started your routers in GNS3.


# The purpose of this scrip is to launch all running Dynamips router consoles in such a way that all consoles exist
# as tabs in a single terminal windows, rather than the 
#default behavior to open multiple windows that just clutters the desktop.
#Script written by Mukom Akong TAMON [mukom to tamon at gmail dot com] .....
#Use and distribute freely .... just give me credit for creating it ok? ... ;-)
#Save this with an sh extension, make it executable and then you can run either from
#inside an existing terminal or you press ALT+F2 and then run it. You must pass it the name of the .net file of your current lab
#e.g ./
#It is best if you copy the script so it is in the same directory as the directory in which the .net file is.
#Obviously, this script only works for Linux distributions that are using GNOME eg Ubuntu.

TELNETTABNAME1=/Users/mukom/tmp/telnettabname1	#Initial set of command arguments for gnome terminal
TELNETTABNAME2=/Users/mukom/tmp/telnettabname2	#Strip away the tab from the commands -- just in case
TELNETTABNAME=/Users/mukom/tmp/telnettabname		#the commands sorted so we have things sequentially

#First delete the files if they exit
rm -f  $PORTS
rm -f  $NAMES
rm -f $LASTCMD

#Xtract the ports from .net file and put them into ports file in /tmp 
grep -E console  $1 | sed s/console\ =\ // | tr -d [] | tr -s '[:blank:]' >> $PORTS

#Create corresponding file that containts the names
#grep -E ROUTER  $1 | sed s/ROUTER\ // | tr -d [] | tr -s '[:blank:]' >> $NAMES
grep -E '\[\[ROUTER'  $1 | sed s/ROUTER\ // | tr -d [] | tr -s '[:blank:]' >> $NAMES

#This block constructs the telnet commands for each router and writes them to $TELNETTABNAME
for i in $( cat $PORTS ); do
#	let inst=inst+1
	#echo >> $TELNETCMDS "telnet localhost $i -t" 
#	echo >> $TELNETCMDS "\"telnet localhost $i\" -t" 
	echo >> $TELNETCMDS "\"telnet localhost" "$i\"" ' -t' 

#Combine the telnet command with the device name on same line

#replace all tabs with a single space.
#cat $TELNETTABNAME #| tr '\t' '" -t "' 

#Now sort the file

#how many lines [routers] in the file?
routers=`wc -l $TELNETTABNAME`	#count lines in the file and set result as variable routers.
routers=${routers%$TELNETTABNAME}  #Make the routers variable an integer?
echo "There are $routers Routers in this topology"
let "routers = $routers+1"
#declare -i routers    #This seems not to serve any useful purpose that I know of
# echo "I now start with a router count of $routers"

#This block reads in the commands from a file and assign each line to a dimensioned variable R[x]
	while [ "$counter" -lt "$routers" ]
		read R[$counter]
		let "counter=$counter+1"

#This block just prints out the contents of the dimension - I want to be sure I read the right things into the variables
while [ "$counter" -lt "$routers" ]
	echo ${R[$counter]}
	let "counter=$counter+1"

#Build the gnome-terminal command and options from the contents of the R[x] dimension
let "routers=$routers-2"  #One main window and then the -2 so we cover just the right number of tabbed auxilliary windows
command="gnome-terminal --window --maximize -e ${R[$counter]}"
while [ "$counter" -lt "$routers" ]
		let "counter=$counter+1"
		command="$command --tab -e ${R[$counter]}"
		#echo $command
echo >>$LASTCMD $command
chmod 777 $LASTCMD
#I can delete these files now, since I no longer need them --- just house cleaning
rm -f  $PORTS
rm -f  $NAMES

I appreciate any modifications …. and this works for me … so I don’t have to get KDEbase libararies just for konsole4KDE. I hope u enjoy it.

11 thoughts on “Open GNS3 Router Consoles in Multiple Tabs in a Single Window [GNOME]

  1. Hi there!

    Nice scripts, but I have something to comment.
    Maybe it’s only for me (Ubuntu 9.04) but the secondary script did not work as you provide it above.
    I had to modify from -tab to –tab, -maximize to –maximize and also the same for -window to –window.

    Thanks and keep on the good work!

  2. I am running U8.10. I am trying the first script. I am getting the following error. I am a newbie for the Linux.

    tango@tango-laptop:~$ /home/tango/Public/CCIE/ Lab_2
    bash: /home/tango/Public/CCIE/ Permission denied

    I have checked the permission. I have Read and Write permission to the folder and files. I donot have files (like $ports, etc). I have also tried to rem out that portion.

    Any help will be much appreciated.

  3. Hi Calin,

    When I try to run this script, I get the following error :
    “There was an error creating the child process for this terminal”

    I’m running ububtu 10, 64 bit.

    Following is the script:
    r1=”telnet localhost 2001″
    r2=”telnet localhost 2002″
    r3=”telnet localhost 2003″
    r4=”telnet localhost 2004″
    r5=”telnet localhost 2005″
    r6=”telnet localhost 2006″
    sw1=”telnet localhost 2007″
    sw2=”telnet localhost 2008″
    sw3=”telnet localhost 2009″
    sw4=”telnet localhost 2010″
    bb1=”telnet localhost 2011″
    bb2=”telnet localhost 2012″
    bb3=”telnet localhost 2013″
    gnome-terminal \
    –window –maximize -e “$r1″ -t R1 \
    –tab -e “$r2″ -t R2 \
    –tab -e “$r3″ -t R3 \
    –tab -e “$r4″ -t R4 \
    –tab -e “$r5″ -t R5 \
    –tab -e “$r6″ -t R6 \
    –tab -e “$sw1″ -t SW1 \
    –tab -e “$sw2″ -t SW2 \
    –tab -e “$sw3″ -t SW3 \
    –tab -e “$sw4″ -t SW4 \
    –tab -e “$bb1″ -t BB1 \
    –tab -e “$bb2″ -t BB2 \
    –tab -e “$bb3″ -t BB3

    Please help !!


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