systemd Developer Lennart Poettering lennart@poettering.net nss-mymachines 8 nss-mymachines libnss_mymachines.so.2 Provide hostname resolution for local container instances. libnss_mymachines.so.2 nss-mymachines is a plugin for the GNU Name Service Switch (NSS) functionality of the GNU C Library (glibc) providing hostname resolution for containers running locally, that are registered with systemd-machined.service8. The container names are resolved to IP addresses of the specific container, ordered by their scope. To activate the NSS modules, mymachines has to be added to the line starting with hosts: in /etc/nsswitch.conf. It is recommended to place mymachines near the end of the nsswitch.conf line to make sure that this mapping is only used as fallback, and any DNS or /etc/hosts based mapping takes precedence. Here's an example /etc/nsswitch.conf file, that enables mymachines correctly: passwd: compat group: compat shadow: compat hosts: files dns mymachines myhostname networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis systemd1, systemd-machined.service8, nss-myhostname8, nsswitch.conf5, getent1