Show welcome message after starting a shell ...

... with some basic information, mainly
to show that the dotfiles are used

.config/shell/welcome

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# Show system info each time a shell is started
+
+
+_hostname=$(uname -n)
+_os="$(uname -s) $(uname -r)"
+_user=$(whoami)
+_work_dir=$(echo "$PWD" | sed "s|^$HOME|~|")
+
+if uptime -p >/dev/null 2>&1; then  # because some systems (e.g. BusyBox) don't support "-p"
+    _uptime=$(uptime -p | sed 's/up //; s/weeks\?/w/g; s/days\?/d/g; s/hours\?/h/g; s/minutes\?/m/g; s/ //g')
+else
+    _uptime=$(uptime 2>/dev/null | sed 's/.*up *//; s/,.*//')
+fi
+
+
+if [ "$(id -u)" -eq 0 ]; then
+    _prompt="#"
+else
+    _prompt="$"
+fi
+
+
+if [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ]; then
+    _remote="  ssh"
+else
+    _remote="  local"
+fi
+
+
+if _in_bash; then
+    _shell_type="bash"
+elif _in_zsh; then
+    _shell_type="zsh"
+else
+    _shell_type="non-bash/zsh shell"
+fi
+
+
+_info_line="$_user@$_hostname:$_work_dir$_prompt$_remote  $_os  uptime: $_uptime  $_shell_type"
+_sep_line=$(echo "$_info_line" | sed 's/./─/g')
+
+
+echo ""
+echo "$_sep_line"
+echo "$_info_line"
+echo "$_sep_line"
+echo ""
+
+
+unset _hostname _os _user _work_dir _uptime _prompt _remote _shell_type _info_line _sep_line

.profile

@@ -60,3 +60,7 @@ fi
 
 # Put local executables on the `$PATH`
 _prepend_to_path "$HOME/.local/bin"
+
+
+# When everything is loaded, show a little welcome message
+case $- in *i*) [ -f "$HOME/.config/shell/welcome" ] && . "$HOME/.config/shell/welcome";; esac