Rsync

Server

Add user & group

groupadd rsync
useradd rsync -g rsync -s /sbin/nologin

Configure rsyncd.conf

vim /etc/rsyncd.conf
-----
read only = no
use chroot = yes
uid = srv
gid = lxfiles
pid file=/var/run/rsyncd.pid
log file=/var/log/rsyncd.log
 
[examplemodule]
secrets file = /etc/rsyncd.secrets
auth users = srv
path = /home/srv/
-----

Configure secrets file

vim /etc/rsyncd.secrets
-----
rsync:<your-password>
-----
 
chmod 600 /etc/rsyncd.secrets

Daemon start

rsync --daemon --config=/etc/rsyncd.conf

Client

Create password file

echo "<your-password>" > /etc/rsyncd.passwd
chmod 600 /etc/rsyncd.passwd

---

Sync

Local to remote

rsync -av --password-file=/etc/rsyncd.passwd /path/to/local/folder/ suling@192.168.123.100::examplemodule

Remote to local

rsync -av --password-file=/etc/rsyncd.passwd suling@192.168.123.100::examplemodule/ /path/to/local/folder/

Log

rsync -av --password-file=/data/ssh/root/.secrets/rsyncd.passwd /storage/emulated/0/DCIM/ suling@192.168.123.100::DCIM > /sdcard/Android/.logs/`date "+%Y-%m-%d-%H-%M"`_rsync_DCIM.log 2>&1