From short time, i face problem with GNS3. The problem is when i create topology consist of number of routers, GNS3 open terminal windows counted by number of routers.
Solve this problem is installing “KDE Console” that has feature called “Multi TAB”
$ sudo apt-get install konsole
$ sudo yum install konsole
After go to GNS3
Edit > preferences > Terminal Settings
and Change to “KDE Konsole” then use > ok > Apply