Ubuntu :: Reboot From Command Line To A Different OS?
May 20, 2010
I would like to know if I can reboot my headless ubuntu machine from command line to a different OS on the same disk. To clarify, I want to do this without having to manually choose in GRUB.
OS1: Ubuntu on sda1- it is the default OS in an always on server.
OS2: Fedora on sda2 - have to login into this once in a while.
There are no monitors attached with the machine. So I cannot manually scroll through grub and choose Fedora. I want to know if there is a command I can issue remotely to the Ubuntu server to reboot to Fedora.
I've upgraded a server on our LAN from fully functioning Wheezy to Jessie. All seems fine except remote administering using Putty from my windows workstation when issuing reboot from command line, it goes down and reboots but stops at login prompt asking for username and password and does not come back on the LAN network. This server does not normally have a monitor or keyboard so my ability to remote admin this server in effect is disabled.
If I log on, it will come back on the LAN network. I've checked the logs but can't see any errors. Is it in the configuration of Jessie somewhere or perhaps a Grub issue. I have 5 other production Wheezy servers that I intend to update to Jessie once I understand how to deal with this problem.
i've gotten my fedora 12 to the point where i can run python3 scripts from command line and can call up python 2.6.2 idle with the command 'idle' from command line. what command will call up python3 (3.1.2 to be exact) idle?
I know my way around MS Windows much better, but I just don't feel right trying to program something for Android on a Microsoft operating system. I am interested in Android programming so I followed the instructions on [URL] to install the environment on my computer...
I just installed the JDK, SDK, Eclipse successfully (or I assume):
* When I get to Step 4 where I'm supposed to run 'android' it will not run. I get the error message "android: command not found" (I am definitely in the right directory).
** When I double-click it in nautilus, it opens up in gedit. I can set the permissions in nautilus (through the properties - Allow executing file as a program) and get it to work,
how to pass something more than a one-command startup for gnome-terminal. I will give an example of what I'm trying to do here:
Code:
#! /bin/bash # #TODO write this for gnome and xterm
[code]....
This same error occurs if the gnome-terminal line is changed to
Code:
gnome-terminal -e mcTerm
Is there any way to pass more than one command on to gnome-terminal? I have tried various single and double quoting senarios and in a final attempt, I abstracted to an exported function all to no avail. Perhaps even though gnome-term is better at many things than xterm, xterm trumps it in this instance.
When I log onto my 10.04 server via ssh, there is the /etc/motd displayed. This motd is made up each time by the files in /etc/update/motd.d/. There is this one file : update-motd-reboot-required The content is exec /usr/lib/update-notifier/update-mot-reboot-required and the content of this one is : if the file /var/run/reboot-required exists, print it.
But who is making this file and why ?we know who it is: it's pam_motd.. but why would I reboot ??!?
$cmd If this script is executed, an error is generated. The reason written was that "The execution fails because the pipe is not expanded and is passed to date as an argument".What is meant by expansion of pipe. When we execute date | wc on the command line, it goes fine.then | is not treated as an argument. Why?
which does not work on the invisible directories (why?). When I used ".*" as wildcard it changed all (visible) files including the parent directory (the one I was currently working in which is the "dot") . I can change the invisible directories owner and group using dophin but how is it done from the command line?
I am trying to learn how to pass more than a one-command startup for gnome-terminal.
I will give an example of what I'm trying to do here:
Code: #! /bin/bash # #TODO write this for gnome and xterm USAGE=" ${0##*/} [-x] [-g] code....
However, running with the -g option to invoke gnome-terminal, I get a "There was an error creating the child process for this terminal" error.
This same error occurs if the gnome-terminal line is changed to
Code: gnome-terminal -e mcTerm
Is there any way to pass more than one command on to gnome-terminal? I have tried various single and double quoting senarios and in a final attempt, I abstracted to an exported function all to no avail. Perhaps even though gnome-term is better at many things than xterm, xterm trumps it in this instance.
Using netbook asus 1005ha with lucid beta 1 with most of updates on learning to use the CLI and headaches cd command does not seem to reconise directories here is a sample
Code:
yeh i know read the f#####g manual i am but any help would be greatly accepted tried sudo with same commands same problem did have a problem on my debian system that was to do with paths this is not the same on a different footnote anyone thinking of upgrading to lucid sit tight on 9.10 there are still to many issues that need ironing out for a system that is your main system.
I'm trying to schedule a reboot ,using the 'at' command. Normally to reboot I have to be 'root'. I tried using sudo to start 'at',to no avail. How would I type the command ,using at, to reboot?
What is the exact way 'reboot -f' command operates? How does it differ from regular reboot/shutdown? Is it proper to restart pc using 'reboot -f', if not why? The reason why I'm asking this: After installing live-distros via USB, I usually do this 'reboot -f' for restarting.
Is there a way to execute some command and then after the command completes utomatically reboot the system and then after the system reboots execute another command ? For example look at the sequence shown below(1) Execute command-1(2) After the command-1 in (1) is completed,reboot the system (3) Execute command-2(4) After execution of command-2 reboot the sytemIs there a way i can automate this process so that i need not reboot the system manually
Is there a command i can enter into the terminal or over an SSH session to make an Ubuntu system reboot a few hours later? Sometimes I want to reboot my server and it should take place in the middle of the night when I'm asleep.
I've added entries to my Openbox menu labeled Reboot and Shutdown. Problem is, reboot and shutdown h only work as root, and I never login as root. I've tried su-to-root -c reboot, but the menu entries remain unresponsive. I do not have sudo installed because I feel it is a security issue. However, I found that sudo reboot works with the menu entry, but only if my account is set to use sudo without a password in /etc/sudoers. I use tint2 as my panel, but have had no luck with finding a shutdown/reboot button.
I set the file as executable. sudo chmod +x /etc/init.d/myshutdown.sh
I inserted a symlink in the rc0.d directory with the process order K04. sudo ln -s /etc/init.d/myshutdown.sh /etc/rc0.d/K04myshutdown.sh
I also inserted a symlink in the rc6.d directory with the process order K04. sudo ln -s /etc/init.d/myshutdown.sh /etc/rc6.d/K04myshutdown.sh
Apparently rc0.d is for shutdown and rc6.d if for reboot
After reboot it appears that rtorrent does not run (I cannot connect to rtorrent via rutorrent) but really what is going on. I am trying to do this because rtorrent does a hash check on all files if it is not shutdown properly. I just want it to shutdown automatically and safely, before the system shuts down.
I am using Slackware 13.1 on my Asus K40IN, I also use dual boot by LILO with Windows XP. In Windows XP I can reboot or shutdown by select Start -> Turn off Computer, or just physically push the power button, then the machine will shutdown. In my Slackware 13.1, I can physically push the power button, the machine show that it is switching to run level 0, and then it will power off. However, I can not turn it off or restart my machine by the command (run "halt" or "reboot" as root), it show identical things like when I physically push button, but when it turn to status "Restarting machine" or "Turning off machine", my computer hang there, it does not power off machine or restart it. Is there any one experienced this situation? What should I do to fix it?
How can we do everything, or as much as we can do, from the command line? In particular, I am trying to get rid of the top panel in Ubuntu. Because,
1) It takes unnecessary valuable space. 2) Even if I use a huge monitor, it introduces distraction to me while working.
I created a shortcut so that with a single keyboard key I can open a terminal. For example, if I want to restart the computer, I use: "sudo shutdown -r now". Or I can even create a shorter alias. So I do not need the logout menu. But my problem is, some programs put an icon on the top panel when they are working. So, what is the best way of using command line, and getting rid of the top menu.
I was wondring if 7zip still only runs in the command line. I searched and got a bunch of old threads like this: [URL].. but I'm not sure if that has changed since 2007. A GUI would be awesome.
I have a virtual private server that I SSH into. While I am using SSH, I need to be able to FTP from command line to another server. I want to do this in the easiest most sure way possible. (I am not using my real IP below for security.) I have tried the following commands.
sftp 10.99.99.99 ssh: connect to host 10.99.99.99 port 22: No route to host Couldn't read packet: Connection reset by peer ssh 10.99.99.99 ssh: connect to host 10.99.99.99 port 22: No route to host
About two months ago I upgraded my dual boot Linux-x86-64 Vista from Heron to 10.04 Lucid. Initially everything worked fine including wireless etc. Once I accidentally changed a few /etc permissions which caused a problem, but fixed it going into recovery mode. For the past weeks, I only used the windows. Over the weekend I tried logging into Ubuntu, the gnome would not come up. So, I went into recovery mode and typed "sudo apt-get update && sudo apt-get upgrade" which also went through. However, after that I lost the recovery options. I had used that command very successfully in the past. Right now, I have no command line that would allow me to type something. I was wondering if there are any keys Alt+Del + something that would give me a prompt I can work with. I'm totally baffled as to how this can happen.
