Unobtained locks in ubuntu

The unobtained lock in ubuntu is a problem encountered when running sudo apt-get update, that is, there is often an error in ubuntu-No lock is obtained. Www.2cto.com what does that mean? This means that there is currently a conflicting program running, and linux only allows such a program to run, that is, if you want to obtain the right to run the program, you must first unlock the lock of the previous running program, that is, close it. This conflict occurs because the software is not immediately shut down during update/uninstall/Add, which is easy to solve in linux, as long as you follow the prompts on the terminal, use sudo rm .... command to remove the lock of the corresponding directory.