Open Source Comes to Campus/UMD/Laptop setup/OSX command line: Difference between revisions

Content added Content deleted
imported>Jesstess
No edit summary
imported>Jesstess
No edit summary
 
Line 77: Line 77:
* An absolute path contains the full set of directories from the root of the file system up to your target file or directory. On OS X, an absolute path starts with <tt>/</tt>.
* An absolute path contains the full set of directories from the root of the file system up to your target file or directory. On OS X, an absolute path starts with <tt>/</tt>.
* You can <tt>cd</tt> to an absolute path from anywhere on the filesystem.
* You can <tt>cd</tt> to an absolute path from anywhere on the filesystem.
* This is an example absolute path: <tt>/home/jesstess/projects</tt>
* This is an example absolute path: <tt>/Users/jesstess/projects</tt>


<b>Relative paths</b>
<b>Relative paths</b>
* A relative path is calculated relative to your "current working directory" -- the directory you are currently in at a command prompt, as displayed by <tt>pwd</tt>.
* A relative path is calculated relative to your "current working directory" -- the directory you are currently in at a command prompt, as displayed by <tt>pwd</tt>.
* This is an example relative path: <tt>projects</tt>. That path only has meaning given a current working directory. If your current working directory were <tt>/home/jesstess</tt>, then <tt>cd projects</tt> would take you to <tt>/home/jesstess/projects</tt> assuming that such a directory existed. If you were in <tt>/home/brad/Desktop</tt>, then <tt>cd projects</tt> would take you to <tt>/home/brad/Desktop/projects</tt>.
* This is an example relative path: <tt>projects</tt>. That path only has meaning given a current working directory. If your current working directory were <tt>/Users/jesstess</tt>, then <tt>cd projects</tt> would take you to <tt>/Users/jesstess/projects</tt> assuming that such a directory existed. If you were in <tt>/Users/brad/Desktop</tt>, then <tt>cd projects</tt> would take you to <tt>/Users/brad/Desktop/projects</tt>.


===Tips===
===Tips===


* You can use Tab to auto-complete directory and file names. So from inside the root directory <tt>/</tt>, if you type <code>cd ho</code> and hit Tab, the command prompt will auto-complete the directory name, and you can then hit enter to change into the <code>/home</code> directory.
* You can use Tab to auto-complete directory and file names. So from inside the root directory <tt>/</tt>, if you type <code>cd Us</code> and hit Tab, the command prompt will auto-complete the directory name, and you can then hit enter to change into the <code>/Users</code> directory.
* The command prompt maintains a command history. You can use the up arrow to cycle through old commands.
* The command prompt maintains a command history. You can use the up arrow to cycle through old commands.


Line 95: Line 95:
# After starting a new command line prompt, how would you get to the root directory?
# After starting a new command line prompt, how would you get to the root directory?
# How do you check what files and directories are in your current working directory?
# How do you check what files and directories are in your current working directory?
# If you are in directory <tt>/home</tt>, and you want to get to <tt>/home/jesstess/projects</tt>, how would you do that?
# If you are in directory <tt>/Users</tt>, and you want to get to <tt>/Users/jesstess/projects</tt>, how would you do that?
# What are 2 ways to avoid typing out a full navigation command? (hint: one requires that you've run the command before)
# What are 2 ways to avoid typing out a full navigation command? (hint: one requires that you've run the command before)
# What is the difference between <tt>cd projects</tt> and <tt>cd /projects</tt>?
# What is the difference between <tt>cd projects</tt> and <tt>cd /projects</tt>?