rkhunter

/etc/.java

[06:27:17] Checking for hidden files and directories [ Warning ] [06:27:17] Warning: Hidden directory found: /etc/.java

Created by openjdk-17-jre-headless package's postinst:

    [ -d /etc/.java ] || mkdir -m 755 /etc/.java
    [ -d /etc/.java/.systemPrefs ] || mkdir -m 755 /etc/.java/.systemPrefs
    if [ ! -f /etc/.java/.systemPrefs/.system.lock ]; then
        touch /etc/.java/.systemPrefs/.system.lock
        chmod 644 /etc/.java/.systemPrefs/.system.lock
    fi
    if [ ! -f /etc/.java/.systemPrefs/.systemRootModFile ]; then
        touch /etc/.java/.systemPrefs/.systemRootModFile
        chmod 644 /etc/.java/.systemPrefs/.systemRootModFile
    fi