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https://github.com/MisterTea/EternalTerminal

Re-Connectable secure remote shell
https://github.com/MisterTea/EternalTerminal

mosh remote-shell ssh terminal tmux

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Re-Connectable secure remote shell

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README 

        
# Eternal Terminal



Eternal Terminal is a remote shell that automatically reconnects without interrupting the session.



Website: .



## Integration tests



Circle: [![CircleCI](https://circleci.com/gh/MisterTea/EternalTerminal/tree/master.svg?style=svg)](https://circleci.com/gh/MisterTea/EternalTerminal/tree/master)



Linux: ![Linux CI](https://github.com/MisterTea/EternalTerminal/workflows/Linux%20CI/badge.svg?branch=master)



## Packaging status



[![Packaging

status](https://repology.org/badge/vertical-allrepos/eternalterminal.svg)](https://repology.org/project/eternalterminal/versions)



## Installing



### macOS



The easiest way to install is using Homebrew:



```

brew install MisterTea/et/et

```



If the install fails on including csignal, see https://github.com/MisterTea/EternalTerminal/issues/662#issuecomment-2408889829



Then if you want a daemon to launch `etserver` on every boot:



On m1 (Apple Silicon) Macs:



```

sudo sed 's:/usr/local/bin/etserver:/opt/homebrew/bin/etserver:g' ../init/launchd/homebrew.mxcl.et.plist | sudo tee /Library/LaunchDaemons/homebrew.mxcl.et.plist

sudo launchctl load -w /Library/LaunchDaemons/homebrew.mxcl.et.plist

```



On x86 Macs:



```

sudo cp ../init/launchd/homebrew.mxcl.et.plist /Library/LaunchDaemons/homebrew.mxcl.et.plist

sudo launchctl load -w /Library/LaunchDaemons/homebrew.mxcl.et.plist

```



Alternatively, a package is available in MacPorts:



```

sudo port install et

```



### Ubuntu



For Ubuntu, use our PPA:



```

sudo add-apt-repository ppa:jgmath2000/et

sudo apt-get update

sudo apt-get install et

```



Or see "Debian/Ubuntu" below to install and build from source (e.g., for ARM).



### Debian



For debian, use our deb repo. For buster:



```

echo "deb https://github.com/MisterTea/debian-et/raw/master/debian-source/ buster main" | sudo tee -a /etc/apt/sources.list.d/et.list

curl -sSL https://github.com/MisterTea/debian-et/raw/master/et.gpg | sudo tee /etc/apt/trusted.gpg.d/et.gpg >/dev/null

sudo apt update

sudo apt install et

```



### CentOS 7



Up to the present day the only way to install is to [build from source](#centos-7-1).



### CentOS 8



```

sudo dnf install epel-release

sudo dnf install et

```



### FreeBSD

On FreeBSD, use:



```

pkg install eternalterminal

```



### Fedora (version 29 and later):



```

sudo dnf install et

```



### openSUSE



```

zypper ar -f obs://network

zypper ref

zypper in EternalTerminal

```



### Other Linux



Install dependencies:



* Fedora (tested on 25):



  ```

  sudo dnf install boost-devel libsodium-devel protobuf-devel \

  	protobuf-compiler cmake gflags-devel libcurl-devel

  ```



* Gentoo:



  ```

  sudo emerge dev-libs/boost dev-libs/libsodium \

  	dev-libs/protobuf dev-util/cmake dev-cpp/gflags

  ```



Download and install from source:



```

git clone --recurse-submodules https://github.com/MisterTea/EternalTerminal.git

cd EternalTerminal

mkdir build

cd build

cmake ../

make

sudo make install

```



### Windows



Eternal Terminal works under WSL (Windows Subsystem for Linux).  Follow the ubuntu instructions.



### Docker Image



See [docker/README.md](docker/)



## Verifying



Verify that the client is installed correctly by looking for the `et` executable: `which et`.



Verify that the server is installed correctly by checking the service status: `systemctl status et`.  On some operating systems, you may need to enable and start the service manually: `sudo systemctl enable --now et`.



You are ready to start using ET!



## Configuring



If you'd like to modify the server settings (e.g. to change the listening port), edit /etc/et.cfg.



## Using



ET uses ssh for handshaking and encryption, so you must be able to ssh into the machine from the client. Make sure that you can `ssh user@hostname`.



ET uses TCP, so you need an open port on your server. By default, it uses 2022.



Once you have an open port, the syntax is similar to ssh. Username is default to the current username starting the et process, use `-u` or `user@` to specify a different if necessary.

```

et hostname (etserver running on default port 2022, username is the same as current)

et user@hostname:8000 (etserver running on port 8000, different user)

```

You can specify a jumphost and the port et is running on jumphost using `--jumphost` and `--jport`. If no `--jport` is given, et will try to connect to default port 2022.

```

et hostname -jumphost jump_hostname (etserver running on port 2022 on both hostname and jumphost)

et hostname:8888 --jumphost jump_hostname --jport 9999

```

Additional arguments that et accept are port forwarding pairs with option `-t "18000:8000, 18001-18003:8001-8003"`, a command to run immediately after the connection is setup through `-c`.



Starting from the latest release, et supports parsing both user-specific and system-wide ssh config file.

The config file is required when your sshd on server/jumphost is listening on a port which is not 22.

Here is an example ssh config file showing how to setup when

- there is a jumphost in the middle

- sshd is listening on a port which is not 22

- connecting to a different username other than current one.



```

Host dev

  HostName 192.168.1.1

  User fred

  Port 5555

  ProxyJump [email protected]:22

```



With the ssh config file set as above, you can simply call et with



```

et dev (etserver running on port 2022 on both hostname and jumphost)

et dev:8000 -jport 9000 (etserver running on port 9000 on jumphost)

```



## Building from Source



### macOS



To build Eternal Terminal on Mac, the easiest way is to grab dependencies with Homebrew:



```

brew install autoconf automake libtool

git clone --recurse-submodules https://github.com/MisterTea/EternalTerminal.git

cd EternalTerminal

mkdir build

cd build

cmake ../

make && sudo make install

```



To run an `et` server for testing, run `./etserver`.  To run an `et`

server daemon persistently across reboots:



```

sudo cp ../init/launchd/homebrew.mxcl.et.plist /Library/LaunchDaemons

sudo launchctl load -w /Library/LaunchDaemons/homebrew.mxcl.et.plist

```



### Debian/Ubuntu



Grab the deps and then follow this process.



Debian/Ubuntu Dependencies:



```

sudo apt install libboost-dev libsodium-dev autoconf libtool \

	libprotobuf-dev protobuf-compiler libgflags-dev libutempter-dev libcurl4-openssl-dev \

    build-essential ninja-build cmake git zip

```



Fetch source, build and install:



```

git clone --recurse-submodules https://github.com/MisterTea/EternalTerminal.git

cd EternalTerminal

mkdir build

cd build

# For ARM (including OS/X with apple silicon):

if [[ $(uname -a | grep 'arm\|aarch64') ]]; then export VCPKG_FORCE_SYSTEM_BINARIES=1; fi

cmake ../

make package

sudo dpkg --install *.deb

sudo cp ../etc/et.cfg /etc/

```



Once built, the binary only requires `libgflags-dev` and `libprotobuf-dev`.



### CentOS 7



Install dependencies:

```

sudo yum install epel-release

sudo yum install cmake3 boost-devel libsodium-devel protobuf-devel \

     protobuf-compiler gflags-devel protobuf-lite-devel libcurl-devel \

     perl-IPC-Cmd perl-Data-Dumper libunwind-devel libutempter-devel

```



Install scl dependencies

```

sudo yum install centos-release-scl

sudo yum install devtoolset-11 devtoolset-11-libatomic-devel rh-git227

```



Download and install from source ([see #238 for details](https://github.com/MisterTea/EternalTerminal/issues/238)):

```

git clone --recurse-submodules https://github.com/MisterTea/EternalTerminal.git

cd EternalTerminal

mkdir build

cd build

scl enable devtoolset-11 rh-git227 'cmake3 ../'

scl enable devtoolset-11 'make && sudo make install'

sudo cp ../systemctl/et.service /etc/systemd/system/

sudo cp ../etc/et.cfg /etc/

```



Find the actual location of et:



	which etserver



Correct the service file (see [#180](https://github.com/MisterTea/EternalTerminal/issues/180) for details).



```

sudo sed -ie "s|ExecStart=[^[:space:]]*[[:space:]]|ExecStart=$(which etserver) |" /etc/systemd/system/et.service

```



Alternativelly, open the file /etc/systemd/system/et.service in an editor and correct the `ExectStart=...` line to point to the correct path of the `etserver` binary.



	 ExecStart=/usr/local/bin/etserver --cfgfile=/etc/et.cfg



Reload systemd configs:



```

sudo systemctl daemon-reload

```



Start the et service:



```

sudo systemctl enable --now et.service

```



## Building using Docker



Builder Dockerfiles are located at [deployment/](deployment/). Supported OSes: CentOS 8, openSUSE and Ubuntu.



## Reporting issues



If you have any problems with installation or usage, please [file an issue on github](https://github.com/MisterTea/EternalTerminal/issues).



## Developers



- Jason Gauci: https://github.com/MisterTea

- Ailing Zhang: https://github.com/ailzhang

- James Short: https://github.com/jshort