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merpal
n00b
Joined: 08 Apr 2005
Posts: 36
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 Posted: Fri Apr 15, 2005 6:23 am Post subject: Simple question that I feel silly asking |
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Being new to linux, I'm not too keen on all these funky keyboard shortcuts, although they are useful.
I'm running gentoo without a window manager, as it's on an older computer and it needs all the ram it can get. 
In another thread, a user says
| Quote: | | and let stuff compile in the background, you'll hardly notice anything. |
How do you "switch" out of an emerge? Is there a way to open another terminal/console? (sorry if I'm using the wrong terminology) |
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Xaid
Guru
Joined: 30 Oct 2004
Posts: 474
Location: Edmonton / Alberta
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| Posted: Fri Apr 15, 2005 6:26 am Post subject: |
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well, if u're not running X, you can either use the virtual consoles (F1 -> F11 or so), or you can emerge GNU screen and then you can have one "screen" doing emerge, another doing running irssi, another doing something else...
I hope that answers your question  |
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evader
Apprentice
Joined: 10 Dec 2004
Posts: 180
Location: Australia
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| Posted: Fri Apr 15, 2005 6:39 am Post subject: |
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Let me give you a bit of a longer answer...
Let's do this as an exercise.
As that is happening, press alt-f2.
Now you're at another login prompt!
Login as a normal user.
Press alt-f3.
Yet another one!!
Press alt-f2 to go back to the terminal you just logged in at, and exit.
Now, press alt-f1 and wait for Screen to finish compiling.
When it's done, type:
Now, look, back at just another empty login prompt? Not really.... type:
This is just an example command for this next trick. You could have executed any command here, such as emerge --sync, emerge -Du world... whatever.
Press ctrl-a-d. That's hold down ctrl, press a then press d.
[detached] should appear.
Now your out of the Screen session, and back at the login prompt.
Type:
And press enter. This is again just an example command. You could have done anything.
Now, type:
That's shorthand for 'Reattach to my Screen session'.
Enjoy.
Search the forums for screen help. I posted a bit of a detailed command explanation there.
Hope that helps.
evader
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merpal
n00b
Joined: 08 Apr 2005
Posts: 36
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| Posted: Fri Apr 15, 2005 7:07 am Post subject: |
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| evader wrote: | Let me give you a bit of a longer answer...
Let's do this as an exercise.
As that is happening, press alt-f2.
Now you're at another login prompt! |
That does nothing. 
Do I need something running first? |
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RuiP
l33t
Joined: 15 Jan 2005
Posts: 643
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| Posted: Fri Apr 15, 2005 7:45 am Post subject: |
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| is not alt+F2 is ctrl+alt+F2 (or F3 or F4... if you are now at F2) |
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HAL_9000
Tux's lil' helper
Joined: 29 Sep 2004
Posts: 114
Location: Netherlands
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| Posted: Fri Apr 15, 2005 8:41 am Post subject: another hint :) |
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Screen is ideal to detach processes (read: to make them independent) from their terminal,
but for simple commands with little or no output that need to run for a while, you can use a & to get the command prompt back immediately...
example: | Code: | | odyssey root # updatedb & |
Erik
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BlackEdder
Advocate
Joined: 26 Apr 2004
Posts: 2588
Location: Dutch enclave in Egham, UK
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| Posted: Fri Apr 15, 2005 10:34 am Post subject: |
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| RuiP wrote: | | is not alt+F2 is ctrl+alt+F2 (or F3 or F4... if you are now at F2) |
The ctrl is only needed when switching away from x windows. For normal consoles just alt is enough |
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merpal
n00b
Joined: 08 Apr 2005
Posts: 36
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| Posted: Fri Apr 15, 2005 2:01 pm Post subject: |
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Alt + Fx and Control + Alt + Fx do nothing. This is a standard American 101 key keyboard.
I did a stage 3 installation using the latest stage available on the gentoo mirrors as of yesterday, then genkernel'ed. When I emerge'd links and irssi, I believe the X server was one of the dependencies.
Any clues? It's annoying having to wait while PHP and MySQL compile. :/
Edit:
I'm not using a window manager, but I might install Fluxbox so I can do more than one thing at a time on this system.  |
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SilverOne
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Joined: 10 Nov 2003
Posts: 161
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| Posted: Fri Apr 15, 2005 2:24 pm Post subject: |
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Just to make sure we get this right:
Are you physically at the machine, or using a remote connection? (remote connections do not work with multiple consoles, but the "screen" program still works).
If you are at the machine, try using the other Alt key (linux differentiates between the two, so you might need to use the other, I believe the left Alt key should work).
Hope This Helps |
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merpal
n00b
Joined: 08 Apr 2005
Posts: 36
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| Posted: Fri Apr 15, 2005 3:20 pm Post subject: |
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YES, I was using the right alt key. The left alt key + Fx works perfectly. <3
Thank you all for the help. |
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enigma_0Z
Guru
Joined: 29 Aug 2004
Posts: 531
Location: Either lurking here or at my forum (see sig)
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| Posted: Fri Apr 15, 2005 4:26 pm Post subject: Re: another hint :) |
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| HAL_9000 wrote: | Screen is ideal to detach processes (read: to make them independent) from their terminal,
but for simple commands with little or no output that need to run for a while, you can use a & to get the command prompt back immediately...
example: | Code: | | odyssey root # updatedb & |
Erik |
Or, if you really want to be spiffy, you can run a command, redirect it's output to null (read dangerous, heh) and send it to the background:
| Code: |
emerge sync &> /dev/null &
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That's what I did before I learn't about ctrl+alt+f1-12
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noobix
n00b
Joined: 17 Jul 2004
Posts: 68
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| Posted: Fri Apr 15, 2005 5:44 pm Post subject: Re: another hint :) |
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| HAL_9000 wrote: | Screen is ideal to detach processes (read: to make them independent) from their terminal,
but for simple commands with little or no output that need to run for a while, you can use a & to get the command prompt back immediately...
example: | Code: | | odyssey root # updatedb & |
Erik |
Also you can ctrl+z to pause, and type fg to resume(or fg <n> if you have a few processes in bg, e.g. fg 1, fg 2 and so on).
Also it's useful to add a few available consoles to default 6 ones into /etc/inittab:
# TERMINALS
c1:12345:respawn:/sbin/agetty 38400 tty1 linux
.........
c9:12345:respawn:/sbin/agetty 38400 tty9 linux
The last three F-keys are reserved for X and logs (i have logs tailed there  )
Cheers |
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woZa
Guru
Joined: 18 Nov 2003
Posts: 340
Location: The Steel City - UK
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| Posted: Fri Apr 15, 2005 6:32 pm Post subject: |
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If you want the emerge in the background try reducing it's priority using nice
| Code: | | nice -n {-20>>19} emerge ..... |
where -20 is highest priority and 19 is lowest.
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curtis119
Bodhisattva
Joined: 10 Mar 2003
Posts: 2160
Location: Toledo, Ohio,USA, North America, Earth, SOL System, Milky Way, The Universe, The Cosmos, and Beyond.
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| Posted: Fri Apr 15, 2005 6:52 pm Post subject: |
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| woZa wrote: | If you want the emerge in the background try reducing it's priority using nice
| Code: | | nice -n {-20>>19} emerge ..... |
where -20 is highest priority and 19 is lowest. |
Or just set
PORTAGE_NICENESS=
in /etc/make.conf
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woZa
Guru
Joined: 18 Nov 2003
Posts: 340
Location: The Steel City - UK
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| Posted: Fri Apr 15, 2005 7:16 pm Post subject: |
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| curtis119 wrote: | Or just set
PORTAGE_NICENESS=
in /etc/make.conf |
I never knew about that! Handy...
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A few months struggling with gentoo is better than a lifetime struggling with windoze! |
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merpal
n00b
Joined: 08 Apr 2005
Posts: 36
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| Posted: Fri Apr 15, 2005 10:00 pm Post subject: |
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| Ok, thanks for all the tips guys. I appreciate it. |
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