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99 changes: 46 additions & 53 deletions exercise/solution/part-1.md
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# Logging in

The following are procedures for logging in to the COARE HPC via the following OS: Windows, Mac, and Linux.

## Table of Contents

- [For Windows](#for-windows)
- [PuTTY](#putty)
- [Command Prompt (for Windows 10 only)](#command-prompt-for-windows-10-only)
- [PuTTY](#putty)
- [Command Prompt (for Windows 10 only)](#command-prompt-for-windows-10-only)
- [For Mac / Linux](#for-mac--linux)

## For Windows

For Windows, users have two options to use in logging in: PuTTY or Command Prompt.
### PuTTY

1. Download and run **PuTTY** application.
- [32-bit](https://the.earth.li/~sgtatham/putty/latest/w32/putty.exe)
- [64-bit](https://the.earth.li/~sgtatham/putty/latest/w64/putty.exe)

- [32-bit:](https://the.earth.li/~sgtatham/putty/latest/w32/putty.exe)
- [64-bit:](https://the.earth.li/~sgtatham/putty/latest/w64/putty.exe)
2. Set port number to **22** and the **Host Name** to **saliksik.asti.dost.gov.ph.**

2. Set port number to **22** and the **Host Name** to **saliksik.asti.dost.gov.ph**.

![Coare Putty Configuration](images/coare-putty-configuration.png)
![Putty](images/putty.png)

3. On the left panel under Category, collapse the **Connection** option and select the **SSH** option, and then click **Auth**. Select **Browse** to attach your **private key** (.ppk file) for authentication. Then click **Open**.

![Coare Putty Authentication](images/coare-putty-auth.png)

4. Select **Yes** when prompted by a PuTTY Security Alert Window.
![Putty-2](images/putty_2.png)

![Coare Putty Alert](images/coare-putty-alert.png)
4. Select **Yes** when prompted by a PuTTY Security Alert Window.

![Putty-3](images/putty_3.png)

5. When the terminal opens, enter your COARE credentials that should have been sent to your email.
6. You are now inside the HPC frontend if you see this (see image below) on your terminal.

![Coare Putty Welcome](images/coare-putty-welcome.png)
6. You are now inside the HPC frontend if you see this (see image below) on your terminal.

![Putty-4](images/putty_4.png)

NOTES:

- Accessing HPC must be passwordless unless you have a passphrase during the generating of keys.
- If you want to use your key (generated using PuTTY) in OpenSSH, check this tutorial on converting PuTTY (.ppk) key to SSH Key.
- You cannot use your OpenSSH keys to PuTTY and vice versa.
- Accessing HPC must be passwordless unless you have a passphrase during the generating of keys.
- If you want to use your key (generated using PuTTY) in OpenSSH, check this tutorial on [converting PuTTY (.ppk) key to SSH Key.](https://www.simplified.guide/putty/convert-ppk-to-ssh-key)
- You cannot use your OpenSSH keys to PuTTY and vice versa.

### Command Prompt (for Windows 10 only)

1. Open **Command Prompt** or **Windows PowerShell**.
2. Type command:

2. Type command:
```
ssh <username>@saliksik.asti.dost.gov.ph
```

Useful options:

| Flag | Description |
| ------------------ | ------------------------------------------------------------ |
| -i \<private-keys> | Indicate the private key to be used |
| -v | Increase verbosity |
| -vv, -vvv | Enable additional verbosity for even more debugging messages |
|Flag |Description |
|------------------|------------------------------------------------------------|
|-i \<private-keys>|Indicate the private key to be used |
|-v |Increase verbosity |
|-vv, -vvv |Enable additioanl verbosity for even more debugging messages|

3. Type **Yes** to add the host in your known hosts.
![Coare Command Prompt Alert](images/coare-cp-alert.png)

![command-prompt-3](images/com-prom-3.png)

4. You should now be inside the HPC frontend.
![Coare Command Prompt Welcome](images/coare-cp-welcome.png)

![command-prompt-4](images/com-prom-4.png)

NOTES:

- Logging in must be passwordless unless you have a passphrase during the generating of keys.
- If you want to use your key (generated using PuTTY) in OpenSSH, check this tutorial on [converting PuTTY (.ppk) key to SSH Key](https://www.simplified.guide/putty/convert-ppk-to-ssh-key).
- You cannot use your PuTTY keys to OpenSSH and vice versa.
- Logging in must be passwordless unless you have a passphrase during the generating of keys.
- If you want to use your key (generated using PuTTY) in OpenSSH, check this tutorial on [converting PuTTY (.ppk) key to SSH Key.](https://www.simplified.guide/putty/convert-ppk-to-ssh-key)
- You cannot use your PuTTY keys to OpenSSH and vice versa.

## For Mac / Linux

1. Launch your Terminal application and type:

```
ssh <username>@saliksik.asti.dost.gov.ph
```
1. Launch your Terminal application and type:
```
ssh <username>@saliksik.asti.dost.gov.ph
```

Useful options:
Useful options:
|Flag |Description |
|------------------|------------------------------------------------------------|
|-i \<private-keys>|Indicate the private key to be used |
|-v |Increase verbosity |
|-vv, -vvv |Enable additioanl verbosity for even more debugging messages|

| Flag | Description |
| ------------------ | ------------------------------------------------------------ |
| -i \<private-keys> | Indicate the private key to be used |
| -v | Increase verbosity |
| -vv, -vvv | Enable additional verbosity for even more debugging messages |
2. Type **Yes** to add the host in your known hosts.

![for-mac-2](images/for-mac-2.png)

2. Type **Yes** to add the host in your known hosts.
![Coare Terminal Alert](images/coare-terminal-alert.png)
3. You are now inside the HPC Frontend.

3. You are now inside the HPC Frontend.
![Coare Terminal Welcome](images/coare-terminal-welcome.png)
![for-mac-2](images/for-mac-3.png)

NOTE: Logging in must be passwordless unless you have a passphrase during the generating of keys.
NOTE: Logging in must be passwordless unless you have a passphrase during the generating of keys.
9 changes: 4 additions & 5 deletions exercise/solution/part-2.md
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> This is a paragraph.
> First line.
> This is a paragraph. First line.
> Next line.
> Third line.
> There should be no extra spacing between each line.
> _**This line is both italic and bold!**_
> **_This line is both italic and bold!_**
>
> There is a blank space above.
> This <sub>line</sub> of <sup>text</sup> is <sub>wavy.</sub>
> This <sub>line</sub> of <sup>text</sup> is <sub>wavy</sub>.

My favorite equation is:

$$ \frac{-b \pm \sqrt{b^2 -4ac}}{2a} $$
$$ \frac{-b \pm \sqrt{b^2-4ac}}{2a} $$
13 changes: 8 additions & 5 deletions exercise/solution/part-3.md
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# Exercises

- [x] Part 1 - [Solution](part-1.md)
- [x] Part 2 - [Solution](part-2.md)
- [x] Part 3 - [Solution](part-3.md)
- [x] Part 1 - [Solutions](part-1.md)
- [x] Part 2 - [Solutions](part-2.md)
- [x] Part 3 - [Solutions](part-3.md)

By:
[Imari Joy C. Borda](mailto:imari.borda2018@gmail.com)
By:
[Jucille Kate Delos Santos](mailto:jucille.delossantos@smc.pshs.edu.ph)
[Randy Hibaya](mailto:rhibaya@zrc.pshs.edu.ph)
[Beige Bernadette Bastasa](mailto:bbbastasa@zrc.pshs.edu.ph)
[Celine Joie del Pilar](mailto:cdel@zrc.pshs.edu.ph)