Package libgconf-2-4 is not installed
E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?
# 卸载libgconf-2-4
$ sudo apt remove libgconf-2-4
$ sudo apt autoclean && sudo apt autoremove
# 安装libgconf-2-4
sudo apt install libgconf-2-4
/var/lib/dpkg/lock-frontend
$ sudo rm -rf /var/lib/dpkg/lock-frontend
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