Yes, doing some code while at holidays is kinda...weird. (nah, definitely it's 1000% weird)
But lets imagine for a seconds if you've never experience that, you can feel the windy-air, and hear some natural sounds, while opening your vim or vscode. Sounds great, isn't it ?
Yeah, until you realize that you need to access your 24/7 container and you don't have a decent connection to do that :D.

SSH #

Secure Shell (SSH) is a fundamental things for us to connect into servers. It's pretty secure and easy-to-use, but SSH isn’t perfect.
The main reason that I didn't like SSH is, the connection problems.
When you have a big network latency, it leads to very-bad typing performance.
Even when you have a pretty decent connection, it can still forcing you to kill it and reconnect, sometimes.

Mosh #

Mosh is a replacement for SSH, it's a "Remote terminal application that allows roaming, supports intermittent connectivity, and provides intelligent local echo and line editing of user keystrokes." - mosh.org
Mosh focus on providing more robust connection, especially over low-speed internet connections, just like were my case above.

But how can they resolve this typing-delay problem ?

Mosh uses UDP-based State Synchronization Protocol, which is responsible for sync the snapshots of the current screen state.
This protocol is aimed at showing the client the most recent server-side state, and is designed to use datagrams/heartbeats to maintain the connection.
Because SSP synchronizes two states instead of waiting for data to actually get transferred, Mosh can display the UI changes much faster.

Installation #

Just like SSH, Mosh need to be installed on both the server and client

$ sudo pacman -S mosh   # there's also a `mosh-git` on the AUR

Connect #

Just like SSH :

$ mosh USER@YOUR-IP-ADDRESS

or If you want to use your SSH key for the auth :

$ mosh --ssh="ssh -i ~/.ssh/identity" USER@YOUR-IP-ADDRESS

You can see Usage page for more information.

Downside #

Mosh is not a 100% perfect replacement.
The one that I have to deal with it is, it doesn't export my $TERM variable, instead, it uses their own predefined ones (which is xterm) but passes escape sequences unmodified.

It maybe not a "problem" for xterm users, but for me (which uses rxvt) it's a problem since xterm and rxvt use different escape sequences.

Because of that, I had to forcefully set $TERM to rxvt-unicode-256color on my server's .zshrc to get my HOME and END button works perfectly.
You can also use urxvt-xtermcompat config if you don't want to mess-up with your server shell config.

In the end, there's still no 100% perfect replacement for SSH, but atleast Mosh give us better typing experience especially on slow internet connection.
Alright, Happy Mosh-ing! (it may sounds weird but whatever :D )