Goals: Introduction to using a Terminal
What does a prompt look like?
General syntax of shell command.
Commands/options are case sensitive.
Getting Help:
Man pages (
man)Options:
<command> --help
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Login
Open up Chrome
Navigate to: MedicineBow OnDemand
Type in your provided username and password. Usually this will be your UWYO username and password, unless you are using an assigned training account.
Authenticate using your preferred 2 factor method (expandable directions below):
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If you usually get a two-factor push to your phone, just hit enter after entering your username and password, then complete authentication by approving the push on your device.
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Without hitting enter after typing in your username and password, in the password text box, append a comma (,) to the end of your password, then append phone as shown in the screenshot below:  You should get a phone call on your main phone # associated with your two factor account. Answer this call and hit # to approve access. |
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If you prefer to use a 2 factor passcode from your Duo Mobile app, without hitting enter after typing in your username and password, in the password text box, append a comma (,) to the end of your password, then append the multi digit passcode found in duo mobile as shown in the screenshot below:  |
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Type in the account password, then, without hitting enter, append a comma (,) to the end of the password, then touch the light on the yubikey as shown in the screenshot and photo below:  Then hit the green light on your yubikey to authenticate:  |
Start MedicineBow Shell Access
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The Command-Line Prompt
Syntax of a Shell Command
Case Sensitive
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# Lists what is in the current location. [arcc-t05@blog1 ~]$ ls Desktop Documents Downloads # Throws an error. [arcc-t05@blog1 ~]$ LS -bash: LS: command not found Filename ≠ FiLeNaMe ≠ FILENAME |
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Filename ≠ FiLeNaMe ≠ FILENAME |
Getting Help: man
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[arcc-t05@blog1 ~]$ man ls
LS(1) User Commands LS(1)
NAME
ls - list directory contents
SYNOPSIS
ls [OPTION]... [FILE]...
DESCRIPTION
List information about the FILEs (the current directory by default). Sort entries alpha‐
betically if none of -cftuvSUX nor --sort is specified.
Mandatory arguments to long options are mandatory for short options too.
-a, --all
do not ignore entries starting with .
-A, --almost-all
do not list implied . and ..
...
Manual page ls(1) line 1 (press h for help or q to quit) |
Getting Help: <command --help>
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[arcc-t05@blog1 ~]$ ls --help
Usage: ls [OPTION]... [FILE]...
List information about the FILEs (the current directory by default).
Sort entries alphabetically if none of -cftuvSUX nor --sort is specified.
Mandatory arguments to long options are mandatory for short options too.
-a, --all do not ignore entries starting with .
-A, --almost-all do not list implied . and ..
--author with -l, print the author of each file
-b, --escape print C-style escapes for nongraphic characters
--block-size=SIZE with -l, scale sizes by SIZE when printing them;
e.g., '--block-size=M'; see SIZE format below
-B, --ignore-backups do not list implied entries ending with ~
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Getting Help: Options
Typically, options can have a:
short-name: “
-a”:Single letter following a single “
-”
long-name: “
--all”:More descriptive word after two dashes “
--”
Short options can be grouped:
“
ls -a –l” can be shortened to “ls –al”
Single vs Multiple Lines
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[arcc-t05@blog1 ~]$ ls -al ~ [arcc-t05@blog1 ~]$ ls \ > -al \ > ~ |
Exercises
Questions:
Is there a difference between running
lsversusls -al?How can you find out what the
–aloptions do?What does the
pwdcommand do?From the command line, what happens if you press the up/down arrow keys?
Answers(1)
1: Is there a difference between running ls versus ls -al?
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[arcc-t05@blog1 ~]$ ls Desktop Documents Downloads [arcc-t05@blog1 ~]$ ls -al total 76 drwxr-x--- 8 arcc-t05 arcc-t05 4096 Oct 3 13:57 . drwxr-xr-x 925 root root 32768 Sep 27 16:21 .. -rw------- 1 arcc-t05 arcc-t05 212 Sep 12 15:44 .bash_history -rw-r--r-- 1 arcc-t05 arcc-t05 18 Aug 10 17:00 .bash_logout -rw-r--r-- 1 arcc-t05 arcc-t05 141 Aug 10 17:00 .bash_profile -rw-r--r-- 1 arcc-t05 arcc-t05 376 Aug 10 17:00 .bashrc drwx------ 3 arcc-t05 arcc-t05 4096 Sep 12 11:36 .config drwxr-xr-x 2 arcc-t05 arcc-t05 4096 Aug 10 17:00 Desktop drwxr-xr-x 2 arcc-t05 arcc-t05 4096 Aug 10 17:00 Documents |
Answers(2)
2: How can you find out what the –al options do?
Use
man lsorls --help-a, --all do not ignore entries starting with .-l use a long listing formatOptions are also case sensitive:
Code Block [arcc-t05@blog1 ~]$ ls -A .bash_history .bash_profile .config Documents .emacs .kshrc .mozilla .zshrc .bash_logout .bashrc Desktop Downloads .esd_auth .lesshst .ssh
Answers(3, 4)
3: What does the pwd command do?
Use
man pwdorpwd --helppwd - print name of current/working directory
4: From the command line, what happens if you press the up/down arrow keys?
Steps through the previous commands you’ve typed.
Next Steps
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