Added debian check, to provide functions only on debian systems.

dot_bashrc.d/executable_09.functions.tmpl

@@ -113,6 +113,8 @@ list-ssh-keys() {
     done
 }
 
+{{ if eq .chezmoi.os "linux" }}
+{{   if eq .chezmoi.osRelease.id "debian" }}
 # Show version of a Debian package
 debversion() {
     if [ -x dpkg ]; then
@@ -135,6 +137,20 @@ deblist() {
     fi
 }
 
+# Show apt installation history
+debhistory() {
+    zcat /var/log/apt/history.log.*.gz | \
+        /usr/bin/cat - /var/log/apt/history.log | \
+        grep -Po '^Commandline:(?= apt)(?=.* install ) \K.*|^Start-Date: \K.*' | \
+        grep -B1 "^apt" | \
+        grep -v -- "^--" | \
+        paste -d " "  - - | \
+        sort
+}
+
+{{   end }}
+{{ end }}
+
 # Run 'top' by a list of processes matching name.
 topby() {
     local name=${1:?name required}