linux - open a tab and running a script using gnome-terminal --tab option on Ubuntu -

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i in project directory.

$ pwd  /home/karthik/projects

i following cmdline.

gnome-terminal --tab --working-directory="/home/karthik/mininet" -e  "sudo ./my_topo.sh"

i expect above command following

1) open tab  2) go working directory `/home/karthik/mininet` 3) execute script `my_topo.sh`

instead seems following.

1) open terminal.  2) go working directory `/home/karthik/mininet` 3) execute script `my_topo.sh`

also on related note,how open tab sudo privileges don't have type in password?

i tried doing following 

wid= xprop -root | grep "_net_active_window(window)"| awk '{print $5}'; xdotool windowfocus $wid; xdotool key ctrl+shift+t $wid

this open new tab how execute following commands in new tab instead of old one.

cd /home/karthik/mininet; sudo ./my_topo.sh

try bash script:

   #!/bin/sh     gnome-terminal -x sudo ./home/karthik/mininet/my_topo.sh

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