Seashells – Pipe Your Linux Command’s Output To Web In Real-time

Seashells – Pipe Your Linux Command’s Output To Web In Real-time

Today, I came across an interesting tool called “Seashells”. It is used to pipe your command-line program’s output to web in real-time. We can use it to share a Linux command’s output to the support team, friends, and colleagues. Also, It can be used as monitoring tool for long-running processes which are continuously producing output in the console. Seashells is actually a client to website. You can either use  directly or just install the Seashells client to pipe your output.

In this brief guide, we are going to see how to install and use Seashells in Linux.

Seashells – Pipe Your Linux Command’s Output To Web In Real-time

Important – Read before before using it

  • Seashells is currently in beta stage. Please don’t use it for any uptime-critical applications.
  • It is not a data storage medium. All old sessions (links) will be deleted after a day.
  • Seashells doesn’t have any account system yet, so each IP address is limited to 5 concurrent sessions.


Like I already said, you don’t have to install anything to use Seashells web service. Just pipe your Linux command’s output to “nc 1337” as shown below. As you might already know, nc(netcat) comes pre-installed in most Linux operating systems.

Say for example, I am going to pipe the output of ‘echo’ command as shown below.

echo 'Welcome To OSTechNix!' | nc 1337

Sample output would be:

serving at

Now, your command’s output using the above URL on any web browser.


Cool, isn’t it? It’s just an example. You can pipe the output of any Linux command or program that takes a long time to complete.

Install Seashells Client

If you use Seashells often, it is recommended to install the Seashells client.

Seashells client is written using Python. So, it can be easily installed using pip utility. To install pip in your Linux distribution, do the following steps.

To install PIP on Arch Linux and its derivatives, run:

sudo pacman -S python-pip

On RHEL, Fedora, CentOS:

sudo yum install epel-release
sudo yum install python-pip


sudo dnf install epel-release
sudo dnf install python-pip

On Debian, Ubuntu, Linux Mint:

sudo apt-get install python-pip

Once PIP installed, run the following command to install ‘Seashells’.

sudo pip install seashells

Using Seashells Client

Once you have the client installed, you don’t have to pipe the output to “nc 1337”. Instead, you can directly pipe the output to seashells. The client has some additional features, such as showing output on stdout as well as forwarding to Seashells.

Now, let me pipe the ls command’s output:

ls -al | seashells

Sample output from my system:

serving at
total 36
drwxr-xr-x 3 sk sk 4096 Jul 17 15:18 .
drwxr-xr-x 3 root root 4096 Jun 6 2016 ..
-rw------- 1 sk sk 589 Jul 11 18:43 .bash_history
-rw-r--r-- 1 sk sk 220 Jun 6 2016 .bash_logout
-rw-r--r-- 1 sk sk 3771 Jun 6 2016 .bashrc
drwx------ 3 sk sk 4096 Jul 17 15:17 .cache
-rw-r--r-- 1 sk sk 5123 Jul 11 18:24 client.ovpn
-rw-r--r-- 1 sk sk 675 Jun 6 2016 .profile
-rw-r--r-- 1 sk sk 0 Jun 6 2016 .sudo_as_admin_successful

Now, your friend can view the above command’s output using URL:

Seashells output in browser

If you want to display the output in plain text, replace, replace the /v/{url} (for view) with /p/{url} (p for plain text). For example, we can pipe the above command’s output as plain text using URL –


Please note that I have replaced the letter “v” with “p” in the URL.

You can delay the command’s output with –delay switch.

htop | seashells --delay 5

The above command will wait for 5 seconds before displaying the output.


For more details about Seashells usage, run:

seashells --help

Have you got a long-running program on your remote system? Just keep an eye on it from your local system using Seashells. I hope this tool will help you in someway. I will be soon here with another helpful article. Until then, stay tuned with OSTechNix.



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