This is what which is happening
[4]+ Stopped sudo nohup exec php socket_axd.php
adnan@vm085:~/server/axdchat/Server$ sudo nohup exec php socket_axd.php &
[5] 2312
adnan@vm085:~/server/axdchat/Server$ sudo nohup exec php axd.com.php &
[6] 2321
[5]+ Stopped sudo nohup exec php socket_axd.php
adnan@vm085:~/server/axdchat/Server$
I want to run multiple files in background.