Why is the command not being executed in shell_exec?

Question

linux

shell_exec('sudo screen -S ch25565 java -Xincgc -Xmx1024M -Xms60M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=4 -XX:+AggressiveOpts -Dfile.encoding=UTF-8 -jar /home/ch1/ch.jar');

Answer 1

sudo screen -d -m -S ch25565 java -Xincgc -Xmx1024M -Xms60M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=4 -XX:+AggressiveOpts -Dfile.encoding=UTF-8 -jar ch.jar