[Ubuntu] Implement new directories hierarchy (#8627)

images/ubuntu/scripts/build/cleanup.sh

@@ -0,0 +1,34 @@
+#!/bin/bash -e
+
+# before cleanup
+before=$(df / -Pm | awk 'NR==2{print $4}')
+
+# clears out the local repository of retrieved package files
+# It removes everything but the lock file from /var/cache/apt/archives/ and /var/cache/apt/archives/partial
+apt-get clean
+rm -rf /tmp/*
+rm -rf /root/.cache
+
+# journalctl
+if command -v journalctl; then
+    journalctl --rotate
+    journalctl --vacuum-time=1s
+fi
+
+# delete all .gz and rotated file
+find /var/log -type f -regex ".*\.gz$" -delete
+find /var/log -type f -regex ".*\.[0-9]$" -delete
+
+# wipe log files
+find /var/log/ -type f -exec cp /dev/null {} \;
+
+# after cleanup
+after=$(df / -Pm | awk 'NR==2{print $4}')
+
+# display size
+ echo "Before: $before MB"
+ echo "After : $after MB"
+ echo "Delta : $(($after-$before)) MB"
+
+# delete symlink for tests running
+rm -f /usr/local/bin/invoke_tests