rsync -av --progress src/ [email protected]:dest/

scp should also do the job but rsync is better

scp -rp src [email protected]:dest/

Nice explanation about the differences can be found here:
http://stackoverflow.com/questions/20244585/how-does-scp-differ-from-rsync

—

scp basically reads the source file and writes it to the destination. It performs a plain linear copy, locally, or over a network.

rsync also copies files locally or over a network. But it employs a special delta transfer algorithm and a few optimizations to make the operation a lot faster. Consider the call.

rsync A host:B
rsync will check files sizes and modification timestamps of both A and B, and skip any further processing if they match.
If the destination file B already exists, the delta transfer algorithm will make sure only differences between A and B are sent over the wire.
rsync will write data to a temporary file T, and then replace the destination file B with T to make the update look “atomic” to processes that might be using B.
Anther difference between them concerns invocation. rsync has a plethora of command line options, allowing the user to fine tune its behavior. It supports complex filter rules, runs in batch mode, daemon mode, etc. scp has only a few switches.

In summary, use scp for your day to day tasks. Commands that you type once in a while on your interactive shell. Its simpler to use, and in those cases rsync optimizations won’t help much.

For recurring tasks, like cron jobs, use rsync. As mentioned, on multiple invocations it will take advantage of data already transferred, performing very quickly and saving on resources. It is an excellent tool to keep two directories synchronized over a network.

Also, when dealing with large files, use rsync with the -P option. If the transfer is interrupted, you can resume it where it stopped by reissuing the command.

Assuming you have followed my previous guide on installing erpnext on a fresh ubuntu instance (http://blog.grs.gr/?p=518&lang=en), we will show you how to install a second site on the same server (DNS based multitenancy).

Continue reading “how to add a second erpnext instance on ubuntu”

This guide is based on https://github.com/frappe/bench, and is tested a couple of times against ubuntu 14.04/64.

• Login as root with ssh.
• Optionally:

  apt-get update
  
  apt-get upgrade
  
  dpkg-reconfigure tzdata
  
  apt-get install nano
  

• Add a user (erpnext for our example).

adduser erpnext

Store password in a safe place for later use.

• visudo (to grant erpnext user sudo privileges, by copying root record)

A nice article on user management: https://www.digitalocean.com/community/tutorials/how-to-add-and-delete-users-on-an-ubuntu-14-04-vps

• Login as erpnext.

  su erpnext

• Download script at home dir and execute it.

cd ~
wget https://raw.githubusercontent.com/frappe/bench/master/playbooks/install.py
sudo python install.py --production --user erpnext

You will prompted for mysql and admin passwords.
Store both passwords in a safe place for later use.

The script is going to take some moments to complete depending on hardware, let’s say 5 or 10 minutes.

• Restart web server, sudo service nginx restart.
• Fire up your browser and point to your server’s IP (or hostname). If everything goes well you will see eprnext login screen. Use your stored admin pass to access web app. Eventually a nice setup wizard will show up at your browser.

You’re amost done. To increase security you should install ssl. We’ll use let’s encrypt for our example.

• su erpnext
• cd ~
• cd frappe-bench
• Important! Assuming your domain is example.com: mv sites/site1.local sites/example.com
• nano sites/example.com/site_config.json
• Add "host_name": "https://example.com",

Don’t forget commas separating json records.

• Enable dns multitenancy: bench config dns_multitenant on
• Regenerate nginx config: bench setup nginx
• Reload nginx: sudo service nginx reload
• Configure let’s encrypt: sudo -H bench setup lets-encrypt example.com

If errors occur, recheck all your steps. If https/ssl still fails, try the manual method below.

• su root
• cd /opt
• wget https://certbot.eff.org/
• sudo service nginx stop
• ./opt/certbot-auto certonly --standalone
• su erpnext
• cd ~/frappe-bench/sites/example.com
• nano sites/example.com/site_config.json
• Add two lines, beware of the commas separating json records! "ssl_certificate": "/etc/letsencrypt/live/example.com/fullchain.pem",
"ssl_certificate_key": "/etc/letsencrypt/live/example.com/privkey.pem"
, save and exit nano
• bench setup nginx, to regenerate cofig files.
• sudo service nginx restart

Now, you should be ok with letsencrypt cert. Letsencrypt certificate expires every three months, so you’d better set up a cronjob that automatically renew certificate. It should be as easy as adding a crontab entry.

• crontab -e
• Add this: # renew letsencrypt certificates on 1st monday of every month and get an email if it gets executed
MAILTO="[email protected]"
0 0 1-7 * * [ "$(date '+\%a')" = "Mon" ] && sudo service nginx stop && /opt/certbot-auto renew && sudo service nginx start

You’re done.

References

Official frappe documentation provides an article for https/ssl:
https://frappe.github.io/frappe/user/en/bench/guides/lets-encrypt-ssl-setup.html

If you want to install a second site on the same server see this:

how to add a second erpnext instance on ubuntu