feat(motd): dynamically read OS version on each login

Previously, OS name and version were captured at installation time
and written statically to the MOTD profile script. After OS upgrades,
the displayed version would still show the old version.

Now OS info is read dynamically from /etc/os-release on each login,
similar to how hostname and IP are already handled.

Affects both Debian/Ubuntu (install.func) and Alpine (alpine-install.func).

Author: MickLesk

misc/alpine-install.func

@@ -125,22 +125,13 @@ update_os() {
 # This function modifies the message of the day (motd) and SSH settings
 motd_ssh() {
   echo "export TERM='xterm-256color'" >>/root/.bashrc
-  IP=$(ip -4 addr show eth0 | awk '/inet / {print $2}' | cut -d/ -f1 | head -n 1)
-
-  if [ -f "/etc/os-release" ]; then
-    OS_NAME=$(grep ^NAME /etc/os-release | cut -d= -f2 | tr -d '"')
-    OS_VERSION=$(grep ^VERSION_ID /etc/os-release | cut -d= -f2 | tr -d '"')
-  else
-    OS_NAME="Alpine Linux"
-    OS_VERSION="Unknown"
-  fi
 
   PROFILE_FILE="/etc/profile.d/00_lxc-details.sh"
   echo "echo -e \"\"" >"$PROFILE_FILE"
   echo -e "echo -e \"${BOLD}${APPLICATION} LXC Container${CL}"\" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${GATEWAY}${YW} Provided by: ${GN}community-scripts ORG ${YW}| GitHub: ${GN}https://github.com/community-scripts/ProxmoxVE${CL}\"" >>"$PROFILE_FILE"
   echo "echo \"\"" >>"$PROFILE_FILE"
-  echo -e "echo -e \"${TAB}${OS}${YW} OS: ${GN}${OS_NAME} - Version: ${OS_VERSION}${CL}\"" >>"$PROFILE_FILE"
+  echo -e "echo -e \"${TAB}${OS}${YW} OS: ${GN}\$(grep ^NAME /etc/os-release | cut -d= -f2 | tr -d '\"') - Version: \$(grep ^VERSION_ID /etc/os-release | cut -d= -f2 | tr -d '\"')${CL}\"" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${HOSTNAME}${YW} Hostname: ${GN}\$(hostname)${CL}\"" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${INFO}${YW} IP Address: ${GN}\$(ip -4 addr show eth0 | awk '/inet / {print \$2}' | cut -d/ -f1 | head -n 1)${CL}\"" >>"$PROFILE_FILE"
 

misc/install.func

@@ -222,21 +222,12 @@ motd_ssh() {
   # Set terminal to 256-color mode
   grep -qxF "export TERM='xterm-256color'" /root/.bashrc || echo "export TERM='xterm-256color'" >>/root/.bashrc
 
-  # Get OS information (Debian / Ubuntu)
-  if [ -f "/etc/os-release" ]; then
-    OS_NAME=$(grep ^NAME /etc/os-release | cut -d= -f2 | tr -d '"')
-    OS_VERSION=$(grep ^VERSION_ID /etc/os-release | cut -d= -f2 | tr -d '"')
-  elif [ -f "/etc/debian_version" ]; then
-    OS_NAME="Debian"
-    OS_VERSION=$(cat /etc/debian_version)
-  fi
-
   PROFILE_FILE="/etc/profile.d/00_lxc-details.sh"
   echo "echo -e \"\"" >"$PROFILE_FILE"
   echo -e "echo -e \"${BOLD}${APPLICATION} LXC Container${CL}"\" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${GATEWAY}${YW} Provided by: ${GN}community-scripts ORG ${YW}| GitHub: ${GN}https://github.com/community-scripts/ProxmoxVE${CL}\"" >>"$PROFILE_FILE"
   echo "echo \"\"" >>"$PROFILE_FILE"
-  echo -e "echo -e \"${TAB}${OS}${YW} OS: ${GN}${OS_NAME} - Version: ${OS_VERSION}${CL}\"" >>"$PROFILE_FILE"
+  echo -e "echo -e \"${TAB}${OS}${YW} OS: ${GN}\$(grep ^NAME /etc/os-release | cut -d= -f2 | tr -d '\"') - Version: \$(grep ^VERSION_ID /etc/os-release | cut -d= -f2 | tr -d '\"')${CL}\"" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${HOSTNAME}${YW} Hostname: ${GN}\$(hostname)${CL}\"" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${INFO}${YW} IP Address: ${GN}\$(hostname -I | awk '{print \$1}')${CL}\"" >>"$PROFILE_FILE"