mount -o remount,rw,sync /system

[emadhajjar]

When I run this command mount -o remount,rw,sync /system System freezing and everything stop working.

[emadhajjar]

shell@android:/ # chmod 777 /data/local/tmp/rootme/nefarious.sh shell@android:/ # echo /data/local/tmp/rootme/nefarious.sh | run-as uid run-as 0 uid 0 no selinux? shell@android:/ # Usage: mount [-r] [-w] [-o options] [-t type] device directory : Read-only file system : No such file or directory : Read-only file system : No such file or directoryn/su : No such file or directoryn/su : Read-only file system shell@android:/ # shell@android:/ #

[energee]

Failing for me here too:

255|shell@android:/ $ mount -o remount,rw /system
mount: Operation not permitted

[zombiestruck]

Try using the one click, newly released.