su
logcat > sdcard/log.txt
logcat > sdcard/log.txt
For Bliss 11:
Use the alt-f1/f7 console, then enter:logcat > sdcard/log.txt
After that is done, you can close the terminal app or use alt-f7 to get back to Android if you are using the Console, and use the File Manager to access your log and share it where needed.