syslog.l2tp_$(date '+%Y%m%d').txt
syslog.pppd_$(date '+%Y%m%d').txt

service sshd restart
**********************************
tar -zcf /var/backups/home.tgz /home/
-------  新增壓縮檔名---------  想備份的目錄

sudo tar -zcf /var/www/html/doc/x96.tgz /var/www/html/x96
sudo tar -zcf /var/www/html/vpn/etc_x96.tgz /etc

***************************************

---------------------------------------------

x96 改pppoe ,
L2tp,Ipsec 有兩個設定要跟著改

1. iptables.rules
2. sysctl.conf
以上兩個檔案要把eth0 改成ppp0


3. ipsec.conf 裡面有一個ip leftid=(220.133.xxx.xxx)
    改成x96.ddns.net


-------------------------------------------

sudo cat /etc/iptables.rules > /var/www/html/x96/iptables.rules.txt
sudo cat /etc/rc.local > /var/www/html/x96/rc.local.txt

sudo crontab -l > /var/www/html/x96/crontab.txt

sudo iptables -L INPUT -n --line-numbers 
show 出行號

列出所有規則，前面加上行號
sudo iptables -L INPUT -n --line-numbers


sudo route add -host 192.168.9.8 dev eth1

----------------------------------------

這個 目錄裡面有opnvpn的iptable
/etc/systemd/system$

hckao@H96PLUS:/etc/systemd/system$ ls -l
total 48
drwxr-xr-x 2 root root 4096  1月 29  2019 basic.target.wants
lrwxrwxrwx 1 root root   42  1月 28  2019 dbus-fi.w1.wpa_supplicant1.service -> /lib/systemd/system/wpa_supplicant.service
lrwxrwxrwx 1 root root   53  1月 28  2019 dbus-org.freedesktop.nm-dispatcher.service -> /lib/systemd/system/NetworkManager-dispatcher.service
lrwxrwxrwx 1 root root   44  1月 28  2019 dbus-org.freedesktop.resolve1.service -> /lib/systemd/system/systemd-resolved.service
drwxr-xr-x 2 root root 4096  1月 28  2019 default.target.wants
drwxr-xr-x 2 root root 4096  8月 27  2020 getty.target.wants
-rw-r--r-- 1 root root  334  8月 15  2020 load-iptables-rules.service
drwxr-xr-x 2 root root 4096 12月  2 10:03 multi-user.target.wants
drwxr-xr-x 2 root root 4096  1月 28  2019 network-online.target.wants
drwxr-xr-x 2 root root 4096  1月 28  2019 network-pre.target.wants
-rw-r--r-- 1 root root  166  8月 16  2020 noip2.service
lrwxrwxrwx 1 root root    9  1月 29  2019 ondemand.service -> /dev/null
-rw-r--r-- 1 root root  733  8月 15  2020 openvpn-iptables.service
lrwxrwxrwx 1 root root   31  1月 28  2019 sshd.service -> /lib/systemd/system/ssh.service
drwxr-xr-x 2 root root 4096  1月 29  2019 sysinit.target.wants
lrwxrwxrwx 1 root root   35  1月 28  2019 syslog.service -> /lib/systemd/system/rsyslog.service
drwxr-xr-x 2 root root 4096  1月 28  2019 systemd-resolved.service.wants
drwxr-xr-x 2 root root 4096 12月  2 10:03 timers.target.wants
----------------------------------------------------------------------