I want to know to display the recently logged in user, like the last
command in linux. However, i am unable to find the last
command. Can anyone suggest me the alternative for the last
command in openwrt ??
Help is very much appreciated
I want to know to display the recently logged in user, like the last
command in linux. However, i am unable to find the last
command. Can anyone suggest me the alternative for the last
command in openwrt ??
Help is very much appreciated
OpenWrt uses only runtime logs to save flash resource:
So, that feature is unreliable and therefore is stripped off:
And it requires to recompile the related packages to enable the feature, otherwise you can get only:
logread -e dropbear
You can get an output, almost similar to the linux command βlastβ using a script.
cat << "EOF" > /root/last
#!/bin/sh
logread -e dropbear | grep 'Password auth succeeded for' | sed 's/^.* dropbear\[//' | sed 's/\]:.*//' | sort -u > /tmp/procids
successfullogins="/tmp/procids"
while IFS= read -r procid
do
user=$(logread -e "$procid" | grep 'Password auth succeeded for' | sed 's/^.*succeeded for //' | sed 's/ from.*//')
ip=$(logread -e "$procid" | grep 'Password auth succeeded for' | sed 's/^.*from //' | sed 's/\:.*//')
starttime=$(logread -e "$procid" | grep 'Password auth succeeded for' | sed 's/authpriv.*//' | sed 's/ from.*//')
endtime=$(logread -e "$procid" | grep 'Exited normally' | sed 's/authpriv.*//' | sed 's/ from.*//')
if [ -z "$endtime" ]; then
endtime="still logged in"
fi
echo -e "$user\t$ip\t$starttime"- "$endtime"
done < "$successfullogins"
exit 0
EOF
chmod 755 /root/last
root@OpenWrt:~# /root/last
'root' 192.168.2.135 Mon Jun 7 14:44:58 2021 - Mon Jun 7 15:21:42 2021
'root' 192.168.2.135 Mon Jun 7 15:21:13 2021 - Mon Jun 7 15:21:16 2021
'root' 192.168.2.135 Mon Jun 7 15:22:02 2021 - Mon Jun 7 17:05:10 2021
'root' 192.168.2.135 Mon Jun 7 16:31:55 2021 - Mon Jun 7 17:04:41 2021
'root' 192.168.2.135 Mon Jun 7 17:08:24 2021 - Mon Jun 7 17:33:35 2021
'root' 192.168.2.135 Mon Jun 7 17:15:01 2021 - Mon Jun 7 17:33:25 2021
'root' 192.168.2.135 Mon Jun 7 17:33:50 2021 - still logged in
Tested with 19.07.7