/etc/issue.d/*
/run/issue.d/*
/usr/lib/issue.d/*
The file /etc/issue is read from
agetty(8)
and similar tools and shown above the login prompt. While some of the
informations can be adjusted with variables, the file itself is static. To
display dynamic content,
issue-generator(1)
generates a /run/issue file from different files.
Files in /etc/issue.d override files with the same
name in /usr/lib/issue.d and
/run/issue.d. Files in
/run/issue.d override files with the same name in
/usr/lib/issue.d. Packages should install their
configuration files in /usr/lib/issue.d. Files in
/etc/issue.d are reserved for the local
administrator, who may use this logic to override the files installed by
vendor packages. All configuration files are sorted by their filename
in lexicographic order, regardless of which of the directories they reside in.