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Copy file name to clipboardExpand all lines: _uw-research-computing/transfer-files-computer.md
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- hpc
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---
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## Introduction
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This guide shows how to transfer (upload/download) files between a local computer and CHTC's file systems. Two options are presented: the `scp` command line utility, and a file transfer program. Additionally, we present tarballs as a way to transfer multiple files easily.
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{% capture content %}
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1.[Transferring Files](#transfer)
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-[On the command line](#transfer-scp)
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-[Using an SSH program (Windows/Mac)](#transfer-winscp)
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-[Re-using SSH connections](#transfer-many)
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3.[Creating and Editing Files in CHTC](#files)
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-[Introduction](#introduction)
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-[Before you transfer](#before-you-transfer)
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-[Option 1: Transfer files with the `scp` command line utility](#option-1-transfer-files-with-the-scp-command-line-utility)
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-[Option 2: Transfer files with a file transfer program](#option-2-transfer-files-with-a-file-transfer-program)
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-[Transfer multiple files using tarballs](#transfer-multiple-files-using-tarballs)
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-[Related pages](#related-pages)
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{% endcapture %}
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{% include /components/directory.html title="Table of Contents" %}
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<aname="transfer"></a>
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**1. Transferring Files**
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=====================
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## Before you transfer
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To transfer files to and from CHTC, you will need the same username and
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hostname information for [logging in](#login), as well as understanding
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where your files are and where you would like them to go.
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To transfer files to and from CHTC, you will need:
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* Your username and hostname information for [logging in](connecting)
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* The location on the file system of the files to be transferred (also referred to as the "path")
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* The location on the file system where you'd like to transfer your files to.
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* Basic skills in [navigating file systems](basic-shell-commands#navigate-directories)
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<aname="transfer-scp"></a>
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A. On the command line
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----------------------------------
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## Option 1: Transfer files with the `scp` command line utility
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On Mac, Linux, or modern Windows (10+) systems, you can use the \"Terminal\" application and
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the `scp` command to copy files between your computer and CHTC servers.
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**Your computer to CHTC**
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**Upload files from your computer to CHTC**
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First, open the \"Terminal\" application and navigate to the directory
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with the files or directories you want to transfer. Then, use this
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First, open the \"Terminal\" application and navigate to the directory with the files or directories you want to transfer using the [`cd` command](basic-shell-commands#navigate-directories). Then, use this
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command to copy these files to CHTC:
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```
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$ scp file username@hostname:/home/username
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scp file username@hostname:/home/username
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```
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{:.term}
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If you would like these files to end up in a different directory inside
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your home directory, just add it to the path at the end of the command.
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**CHTC to your computer**
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**Download files from CHTC to your computer**
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Open the \"Terminal\" application. Do NOT log into CHTC. Instead,
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navigate to where you want the files to go on your computer. Then, use
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this command to copy these files there:
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```
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$ scp username@hostname:/home/username/file ./
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scp username@hostname:/home/username/file ./
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```
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{:.term}
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Again, for many files, it will be easiest to create a compressed tarball
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For transferring many files, it will be easiest to create a compressed tarball
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(.tar.gz file) of your files and transfer that instead of each file
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individually.
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individually.
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<aname="transfer-winscp"></a>
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B. Using a file transfer program (Windows/Mac)
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----------------------------------------------
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## Option 2: Transfer files with a file transfer program
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Windows and Mac users can also use special programs to help them
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transfer files between their computers and CHTC. For Windows, we
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The left window is a directory on your computer, the right window is
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your home directory in CHTC. To move files between the two, simply drag
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and drop.
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your home directory in CHTC. To move files between the two, simply use your mouse to drag
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and drop the files.
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There are other programs besides WinSCP that do this. Another that works
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on Mac and Windows is called [Cyberduck](https://cyberduck.io).
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Another popular file transfer utility available for Mac and Windows is [Cyberduck](https://cyberduck.io). See our [SSH programs](connecting#ssh-programs) table for a list of similar software.
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<aname="transfer-many"></a>
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C. Transferring Multiple Files
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------------------------------
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## Transfer multiple files using tarballs
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If you are transferring many files, it is advantageous to compress them
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into a single compressed file, in order to facilitate transferring them.
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Place all the files you need in a directory, and then either zip it or
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use the \"tar\" command to compress them:
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If you are transferring many files, we recommend compressing them
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into a single file. Move all the files you need into a separate directory, and use the \"tar\" command to compress them:
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```
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$ tar czf data_files.tar.gz file_directory/
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tar czf data_files.tar.gz file_directory/
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```
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{:.term}
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To untar or unzip files on the submit server or head nodes, you can use
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either:
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```
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[alice@submit]$ tar xzf data_files.tar.gz
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```
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{:.term}
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Afterwards, you may transfer the single tarball file as usual.
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or
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To untar files, use the tar command again:
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```
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[alice@submit]$ unzip data_files.zip
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```
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tar xzf data_files.tar.gz
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```
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{:.term}
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<aname="files"></a>
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**2. Creating and Editing Files in CHTC**
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=====================================
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Once you have logged in to a CHTC server, you can edit files from the
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command line, by using a command line file editor. Some common editing
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programs are:
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- nano
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- vi
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- emacs
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`nano` is the most beginner-friendly, and `emacs` is the most advanced.
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