# code.mindmeldr.com /graphterm

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# Troubleshooting FAQ

Contents

- Troubleshooting FAQ
  - Terminal
    - My terminal is unresponsive?
    - I get the error message “bash: ... gls: Permission denied” on the terminal?
    - I get the error message “bash: gls: No such file or directory” on the terminal?
    - When I log into another computer using SSH from my GraphTerm window, why do many features no longer work?
    - How do I paste text?
  - Inline graphics and notebook mode
    - My inline graphics plot does not appear?
    - How do I specify the format for saving a notebook?
  - Session sharing
    - Others cannot see or access my terminal for sharing?
  - Server
    - I’m running the GraphTerm server on a remote computer, but I’m unable to access it using my browser?
    - Can I run the GraphTerm server on port 80 (or 443)?
  - Using GraphTerm on Windows
    - Does GraphTerm work on Windows?
    - GraphTerm fails to load properly on Windows?
  - Using GraphTerm on tablets
    - How do I access the virtual keyboard on the iPad?
    - How do I access the virtual keyboard on Android?

## Terminal

### My terminal is unresponsive?

If your terminal appears to hang, do what you would normally do in a terminal, type `Control-C`. If you are in the fullscreen graphics mode (e.g., using `gframe`), you may need to click on the top of the terminal portion of the window to get the input focus out of the `iframe` and then type `Control-C`. Finally, refreshing the browser by reloading the page may also fix the problem.

### I get the error message “bash: ... gls: Permission denied” on the terminal?

The `sudo easy_install ...` command does not set the execute permission for commands like `gls`. You need to execute the command `sudo gterm_setup` after installation to set the permissions. (The `python setup.py install` command automatically sets permissions.)

### I get the error message “bash: gls: No such file or directory” on the terminal?

The environment variable `GTERM_DIR` contains the directory where `gls` and other commands are located. GraphTerm tries to set the `PATH` variable to automatically include this directory. But sometimes this may fail, in which case you would need to modify you shell initialization files to include `$GTERM_DIR` in `$PATH`. (The menu command terminal/export environment may also help in this situation.)

### When I log into another computer using SSH from my GraphTerm window, why do many features no longer work?

This is normal behavior. Many GraphTerm features only work on the computer that the `gtermhost` program is running on. By default, SSH is treated like any other program that accesses the terminal for input/output. However, you can use the terminal/export environment menu command to set shell environment variables on the remote computer to restore some, but not all, of GraphTerm features. (For a more permanent solution, see the SSH, port forwarding, and remote access section.)

### How do I paste text?

For certain browsers (e.g., desktop Chrome/Firefox), the usual Command-V or Control-V key sequence should directly paste text from the clipboard. If that doesn’t work there are a couple of other ways to paste text. First, you can use the keyboard shortcut Control-O to open a popup window, paste the text into the popup window using the browser’s paste menu command or a keyboard shortcut, such as Command/Control-V, and then type Control-O again to insert the text at the GraphTerm cursor location. (The popup paste window can also be accessed using the terminal/paste special menu item.) Alternatively, for some browsers, and on the iPad, you can click on the cursor before beginning the paste operation and then paste the text directly. This second technique may not always work well for text copied from non-plain text sources, such as a web page. A final workaround is to paste the text into a temporary location as plain text (such as in a plain text editor), and then copy/paste it from there to GraphTerm.

## Inline graphics and notebook mode

### My inline graphics plot does not appear?

If using `gpylab.py`, try adding a `show(False)` function call to display a new image or `show()` to overwrite a previous image. You can also use `display(fig)` to display a figure.

### How do I specify the format for saving a notebook?

The notebook save file format is determined by the filename extension, i.e., `.ipynb` or `.md`.

## Session sharing

### Others cannot see or access my terminal for sharing?

Disable the share/private option to share your terminal.

## Server

### I’m running the GraphTerm server on a remote computer, but I’m unable to access it using my browser?

Ensure that you have included the port number in the URL, e.g., `http//example.com:8900` Also, ensure that any firewall on the server allows incoming connections to the default port 8900 .

### Can I run the GraphTerm server on port 80 (or 443)?

You would need run the server as the root user, which is not recommended at this stage of GraphTerm development. A better way to achieve this is to redirect traffic from port 80 to port 8900. On a Linux server, this can be achieved by executing a single command (as root):

    iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to 8900

## Using GraphTerm on Windows

### Does GraphTerm work on Windows?

The GraphTerm client should work on a Windows browser that supports Websockets, like the latest versions of Chrome/Firefox/Safari or IE10. The GraphTerm server is currently not supported on Windows. (Although the server is written in pure python, it needs access to the pseudo-terminal device that is only supported on Unix/Linux.)

### GraphTerm fails to load properly on Windows?

Ensure that you are using a browser that supports Websockets, like the latest versions of Chrome/Firefox/Safari or IE10. Some Anti-virus programs block Websockets on the browser. You may need to turn them off, or allow access to the domain where the GraphTerm server is running.

## Using GraphTerm on tablets

### How do I access the virtual keyboard on the iPad?

Tap the cursor access the virtual keyboard on the iPad. If the command line ends up behind the keyboard, retract the keyboard and tap the cursor again.

### How do I access the virtual keyboard on Android?

GraphTerm currently works on Android devices, but not very well. Tap the cursor to activate the virtual keyboard on Android tablets. Then tap it two more times and then start typing. Use the bottom menu bar for convenience, especially the Enter option.

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