ps -A|egrep "apt|dpk"
# rm /var/lib/dpkg/lock-frontend
# apt install -y sssd-common
Reading package lists...
Building dependency tree...
Reading state information...
sssd-common is already the newest version (1.16.3-3ubuntu1.1).
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up sssd-common (1.16.3-3ubuntu1.1) ...
E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
dpkg: error processing package sssd-common (--configure):
 installed sssd-common package post-installation script subprocess returned error exit status 100
Errors were encountered while processing:
 sssd-common