UMIACS - User contributions [en]

Screen

2014-10-28T21:35:44Z

Tmoore: /* Usage */

=== Introduction ===
GNU Screen, or "screen", is a window management program available on UMIACS UNIX hosts that splits a terminal into multiple windows that can each be used for a separate process. This can be very useful when a process will be running for a long time. The process is allocated to a virtual terminal created by screen, and it will run in the background while other terminals are being used or if the SSH session ends.

=== Usage ===
To invoke screen, simply use the following command:
'''screen'''

Alternatively, to start a program with screen:
'''screen vi program.c'''

This will invoke screen and, in the newly-created window, start editing the file program.c in vi.

Ctrl-A is the metacharacter for commands in screen; press it before every key command. Some useful commands in screen:

* Ctrl-A + C (Creates a new window.)
* Ctrl-A + d (detach from current session)
* Ctrl-A + [0-9] (Switches to the window corresonding to the number, window 0 is the first window initialized by screen.)
* Ctrl-A + " (Presents a selection of screen windows from which to choose.)
* Ctrl-A + <SPC> / Ctrl-A + <BKSPC> (Switch to the next / previous window.)
* Ctrl-A + k (Kill the current window.)
* Ctrl-A + Ctrl-\ (Kill screen and all its windows.)

See the documentation linked in this page to see a full list of Ctrl-A commands (5.1 Default Key Bindings).

To start a long-running process:
'''screen'''
then run your process.

If you want multiple sessions, name each session:
'''screen -S [session name]'''

If you need to end your ssh session, but want the process to keep running detach it:
'''screen -d'''

When you ssh back in, reattach your session:
'''screen -r'''

If you have named your session:
'''screen -r [session name]'''

=== .screenrc ===
Similar to .bashrc, the file .screenrc in a user's home directory can be used to customize each screen session's startup behavior. Commands listed in this file will be executed upon starting screen. See the link to documentation on screen at the bottom of this page for more information about screen commands (5.2 Command Summary).

=== Useful Links ===
* [http://www.gnu.org/software/screen/ The main page at www.gnu.org.]
* [http://www.gnu.org/software/screen/manual/screen.txt GNU Screen documentation] (also accessed through '''man screen''').

Screen

2014-10-28T21:35:19Z

Tmoore: /* Usage */

=== Introduction ===
GNU Screen, or "screen", is a window management program available on UMIACS UNIX hosts that splits a terminal into multiple windows that can each be used for a separate process. This can be very useful when a process will be running for a long time. The process is allocated to a virtual terminal created by screen, and it will run in the background while other terminals are being used or if the SSH session ends.

=== Usage ===
To invoke screen, simply use the following command:
'''screen'''

Alternatively, to start a program with screen:
'''screen vi program.c'''

This will invoke screen and, in the newly-created window, start editing the file program.c in vi.

Ctrl-A is the metacharacter for commands in screen; press it before every key command. Some useful commands in screen:

* Ctrl-A + C (Creates a new window.)
* Ctrl-A + d (detach from current session)
* Ctrl-A + [0-9] (Switches to the window corresonding to the number, window 0 is the first window initialized by screen.)
* Ctrl-A + " (Presents a selection of screen windows from which to choose.)
* Ctrl-A + <SPC> / Ctrl-A + <BKSPC> (Switch to the next / previous window.)
* Ctrl-A + k (Kill the current window.)
* Ctrl-A + Ctrl-\ (Kill screen and all its windows.)

See the documentation linked in this page to see a full list of Ctrl-A commands (5.1 Default Key Bindings).

To start a long-running process:
'''screen'''
then run your process.

If you want multiple sessions, name each session:
'''screen -S [session name]'''

If you need to end your ssh session, but want the process to keep running detach it:
'''screen -d'''

When you ssh back in, reattach your session:
'''screen -R'''

If you have named your session:
'''screen -r [session name]'''

=== .screenrc ===
Similar to .bashrc, the file .screenrc in a user's home directory can be used to customize each screen session's startup behavior. Commands listed in this file will be executed upon starting screen. See the link to documentation on screen at the bottom of this page for more information about screen commands (5.2 Command Summary).

=== Useful Links ===
* [http://www.gnu.org/software/screen/ The main page at www.gnu.org.]
* [http://www.gnu.org/software/screen/manual/screen.txt GNU Screen documentation] (also accessed through '''man screen''').

Network/VPN/macOS

2014-10-28T16:59:31Z

Tmoore: removed troubleshooting

'''Please note that this tutorial assumes you already have a network connection established.'''
'''Authentication is handled via the Windows domain. If you have an account in the PC Active Directory you already have access.'''

The UMIACS VPN is accessible through the Junos Pulse Client. Alternatively, you can establish a connection through a web browser.

== Connecting through the Junos Pulse client ==
#'''Download the client:'''
#:[[Media:JunosPulse.dmg|OSX Junos Pulse Client]]<br style="clear:both"/>
#:''Upon starting the client for the first time it will ask to upgrade the client. This will pull an up-to-date version of the client with the most recent configuration.''
#'''Open the client and click 'Add' (+) under the connection section.'''
#:[[Image:JunosOSX.png|thumb|left|510px|[OSX] Click the 'Add' (+) button to create a new connection]]<br style="clear:both"/>
#'''In the 'Name' field, enter a descriptive name for this vpn Connection.'''
#'''In the 'Server URL' enter 'vpn.umiacs.umd.edu''''
#:[[Image:JunosOSXSettings.png|thumb|left|510px|[OSX] Enter the name of the vpn server]]<br style="clear:both"/>
#'''Enter your UMIACS windows login credentials and hit connect.'''
#:[[Image:JunosOSXLogin.png|thumb|left|510px|[OSX] Enter UMIACS Windows Credentials]]

<br style="clear:both"/>

== Connecting through a web browser ==
'''Connecting to the VPN via the web browser requires that Java be enable on your machine. For additional information on Java, as well as download links and install instructions please see: http://www.java.com
#'''Open up a browser and go to 'vpn.umiacs.umd.edu' '''
#:Log in using your UMIACS windows side credentials
#'''Click 'Start' in the Network Connect section towards the bottom right hand side of the page.'''
#:This will launch a Java applet that will open up a new window showing the status of your VPN connection.
#:Keep an eye out for a notification at the top of your browser requesting permission to run Java. [[Image:VPNBrowser.png|thumb|center|500px|Click 'Start' to open the Network Connect applet]]
#'''To disconnect from the VPN click 'Sign Out' in the browser.'''

Screen

2014-10-17T19:13:02Z

Tmoore: /* Usage */

Screen

2014-10-17T18:41:58Z

Tmoore: /* Usage */

=== Introduction ===
GNU Screen, or "screen", is a window management program available on UMIACS UNIX hosts that splits a terminal into multiple windows that can each be used for a separate process. This can be very useful when a process will be running for a long time. The process is allocated to a virtual terminal created by screen, and it will run in the background while other terminals are being used or if the SSH session ends.

=== Usage ===
To invoke screen, simply use the following command:
'''screen'''

Alternatively, to start a program with screen:
'''screen vi program.c'''

This will invoke screen and, in the newly-created window, start editing the file program.c in vi.

Ctrl-A is the metacharacter for commands in screen; press it before every key command. Some useful commands in screen:

* Ctrl-A + C (Creates a new window.)
* Ctrl-A + d (detach from current session)
* Ctrl-A + [0-9] (Switches to the window corresonding to the number, window 0 is the first window initialized by screen.)
* Ctrl-A + " (Presents a selection of screen windows from which to choose.)
* Ctrl-A + <SPC> / Ctrl-A + <BKSPC> (Switch to the next / previous window.)
* Ctrl-A + k (Kill the current window.)
* Ctrl-A + Ctrl-\ (Kill screen and all its windows.)

See the documentation linked in this page to see a full list of Ctrl-A commands (5.1 Default Key Bindings).

To start a long-running process:
'''screen'''
then run your process.

If you need to end your ssh session, but want the process to keep running detach it:
'''screen -d'''

If you want multiple sessions, name each session:
'''screen -d [enter a name]'''

When you ssh back in, reattach your session:
'''screen -r'''

If you have named your session:
'''screen -r [session name]'''

=== .screenrc ===
Similar to .bashrc, the file .screenrc in a user's home directory can be used to customize each screen session's startup behavior. Commands listed in this file will be executed upon starting screen. See the link to documentation on screen at the bottom of this page for more information about screen commands (5.2 Command Summary).

=== Useful Links ===
* [http://www.gnu.org/software/screen/ The main page at www.gnu.org.]
* [http://www.gnu.org/software/screen/manual/screen.txt GNU Screen documentation] (also accessed through '''man screen''').

Screen

2014-10-16T15:40:08Z

Tmoore: /* Introduction */

=== Introduction ===
GNU Screen, or "screen", is a window management program available on UMIACS UNIX hosts that splits a terminal into multiple windows that can each be used for a separate process. This can be very useful when a process will be running for a long time. The process is allocated to a virtual terminal created by screen, and it will run in the background while other terminals are being used or if the SSH session ends.

=== Usage ===
To invoke screen, simply use the following command:
'''screen'''

Alternatively, to start a program with screen:
'''screen vi program.c'''

This will invoke screen and, in the newly-created window, start editing the file program.c in vi.

Ctrl-A is the metacharacter for commands in screen; press it before every key command. Some useful commands in screen:

* Ctrl-A + C (Creates a new window.)
* Ctrl-A + d (detach from current session)
* Ctrl-A + [0-9] (Switches to the window corresonding to the number, window 0 is the first window initialized by screen.)
* Ctrl-A + " (Presents a selection of screen windows from which to choose.)
* Ctrl-A + <SPC> / Ctrl-A + <BKSPC> (Switch to the next / previous window.)
* Ctrl-A + k (Kill the current window.)
* Ctrl-A + Ctrl-\ (Kill screen and all its windows.)

See the documentation linked in this page to see a full list of Ctrl-A commands (5.1 Default Key Bindings).

=== .screenrc ===
Similar to .bashrc, the file .screenrc in a user's home directory can be used to customize each screen session's startup behavior. Commands listed in this file will be executed upon starting screen. See the link to documentation on screen at the bottom of this page for more information about screen commands (5.2 Command Summary).

=== Useful Links ===
* [http://www.gnu.org/software/screen/ The main page at www.gnu.org.]
* [http://www.gnu.org/software/screen/manual/screen.txt GNU Screen documentation] (also accessed through '''man screen''').