iiab-diagnostics: test & warn re: non-existent commands

scripts/iiab-diagnostics

@@ -87,7 +87,11 @@ function cat_cmd() {                        # $1 = command + params, $2 = explan
     pth=$(which $cmd | sed 's/[^/]*$//')    # Keep only path on left; Drop command on right
     echo "COMMAND: $pth$1    # $2" >> $outfile
     echo >> $outfile
-    $(echo $1) >> $outfile
+    if [ -z "$pth" ]; then
+        echo "COMMAND NOT FOUND: $1" >> $outfile
+    else
+        $(echo $1) >> $outfile
+    fi
     echo >> $outfile
 }
 
@@ -151,6 +155,7 @@ cat_file /etc/iiab/iiab_state.yml
 cat_file /etc/iiab/config_vars.yml
 cat_file /etc/resolv.conf
 cat_file /etc/network/interfaces
+cat_file /etc/hostapd/hostapd.conf
 
 # Record all Ansible variables: SLOW! OUTPUT TOO LARGE?
 #pushd /opt/iiab/iiab > /dev/null
@@ -178,13 +183,20 @@ cat_cmd 'blkid' 'Mount point details'
 cat_cmd 'ip addr' 'Network interfaces'
 cat_cmd 'ifconfig' 'Network interfaces (old view)'
 cat_cmd 'brctl show' 'Bridge for LAN side'
+cat_cmd 'ip route' 'Routing table'
 cat_cmd 'netstat -rn' 'Routing table'
 cat_cmd 'sudo netstat -natp' 'Ports/Services in use'
 cat_cmd 'systemctl status dnsmasq' 'Is dnsmasq Ok?'
-cat_cmd 'sudo journalctl -u dnsmasq' 'dnsmasq log'
+cat_cmd 'sudo journalctl -b 0 -u dnsmasq' 'dnsmasq log'
 cat_cmd 'env' 'Environment variables'
 #cat_cmd 'ansible localhost -m setup 2>/dev/null' 'All Ansible facts'    # For cleaner scraping of Ansible vars, consider "./runrole all-vars /tmp/all-ansible-vars" 27-31 lines above?
 cat_cmd 'dmesg' 'Linux diagnostic messages'
+cat_cmd 'networkctl' 'systemd-networkd status'
+cat_cmd 'nmcli d' 'NetworkManager status'
+cat_cmd 'sudo journalctl -b 0 -u networkd-dispatcher' 'networkd-dispatcher log'
+cat_cmd 'iw dev' 'list of wireless interfaces'
+cat_cmd 'systemctl status hostapd' 'Is hostapd Ok?'
+cat_cmd 'ps -AH' 'staging of wpa_supplicant service'
 
 echo -e "\n  5. Firewall Rules:\n"
 echo -e "\n\n\n\n5. FIREWALL RULES\n" >> $outfile