Day to Day with Linux

Rob

Administrator
Staff member
Shutting down Linux

At this point you should have installed Linux, and you've looked around at what you have. And then when you're finished you'll have to shut off your computer. Actually, there are computers that are never shut off. Imagine if your ISP shut off the computer every night! The Internet is a 24/7 business so that wouldn't be practical. There are also people who probably just shut off their monitor. As you probably get some sleep occasionally, so we should maybe let our machine have a rest too once and a while. For this, we'll use the shutdown command

As anyone who's used a computer knows, if you shut off you're computer before you've finished saving work, or if there's a power outage that shuts it off for you, data will be lost. At first, if you shut off Linux incorrectly or there was an inopportune thunder storm and you lost electrical power, you could do severe damage to your Linux file system. That will very rarely happen these days, but you should always use the shutdown command when you want to shut off your computer. Linux will tell you about it if you don't - it will run a check on your hard disk automatically when you use it again. If you have a big hard disk, you might as well go and make yourself a sandwich because it's going to take a while. Linux will also run a routine check every once and a while automatically. You also have our permission to fix yourself a sandwich in these cases too.

Shutdown a single computer

The most common way of shutting down a single user Linux system is for you as root to issue the command:

Code:
shutdown -h now
You use this when you plan on shutting your computer off at that moment, as opposed to some later time.

Linux is going for system halt NOW

It will start to shut off programs that you're computer is using and you'll see it all happening. That's because Linux is a transparent system. It lets you see everything it's doing. It won't give you a simple message telling you to wait and then another one telling you you can shut it off now. If something is causing a problem, it will tell you about it when it starts up and when it shuts down. That way, if you are having a problem, you may be able to track it down. If you don't know how to solve it, you can tell another person what you saw and he or she may be able to help you.

With the shutdown command, you must wait until you see the message:

System halted
Power down before you shut off the computer.
Re-booting the computer

Rebooting Your Computer

Code:
shutdown -r now
If you have installed a dual-boot system and you want to use the other operating system, (why would you want to do that?) you would use this command. You will get a similar message as with the -h (halt) option that will say something like:

System going for reboot NOW

The basic reason behind all of these messages is that Linux was conceived to be a networked operating system. You have people at workstations on the network busily doing their work. The last part of the shutdown commandnow is fine for a single-user home PC, but on a network system this would be changed to indicate a time. That way people would have a chance to finish what they were doing before the system went down for maintenence. Using 'now', in a network, would probably be hazardous to the health of the person who sent that command.

The next time you shutdown your system, you may want to try using some time options instead of just now. For example, you may want to try shutting down the computer at a given time.

Code:
shutdown -h 20:01
Which will shutdown the computer at 8:01 PM. You could also try:

Code:
shutdown -h +5
That shuts down the computer in 5 minutes time.

Now you know the correct way to shutdown your Linux system.
 


Pratham

New Member
Shutting down Linux

At this point you should have installed Linux, and you've looked around at what you have. And then when you're finished you'll have to shut off your computer. Actually, there are computers that are never shut off. Imagine if your ISP shut off the computer every night! The Internet is a 24/7 business so that wouldn't be practical. There are also people who probably just shut off their monitor. As you probably get some sleep occasionally, so we should maybe let our machine have a rest too once and a while. For this, we'll use the shutdown command

As anyone who's used a computer knows, if you shut off you're computer before you've finished saving work, or if there's a power outage that shuts it off for you, data will be lost. At first, if you shut off Linux incorrectly or there was an inopportune thunder storm and you lost electrical power, you could do severe damage to your Linux file system. That will very rarely happen these days, but you should always use the shutdown command when you want to shut off your computer. Linux will tell you about it if you don't - it will run a check on your hard disk automatically when you use it again. If you have a big hard disk, you might as well go and make yourself a sandwich because it's going to take a while. Linux will also run a routine check every once and a while automatically. You also have our permission to fix yourself a sandwich in these cases too.

Shutdown a single computer

The most common way of shutting down a single user Linux system is for you as root to issue the command:

Code:
shutdown -h now
You use this when you plan on shutting your computer off at that moment, as opposed to some later time.

Linux is going for system halt NOW

It will start to shut off programs that you're computer is using and you'll see it all happening. That's because Linux is a transparent system. It lets you see everything it's doing. It won't give you a simple message telling you to wait and then another one telling you you can shut it off now. If something is causing a problem, it will tell you about it when it starts up and when it shuts down. That way, if you are having a problem, you may be able to track it down. If you don't know how to solve it, you can tell another person what you saw and he or she may be able to help you.

With the shutdown command, you must wait until you see the message:

System halted
Power down before you shut off the computer.
Re-booting the computer

Rebooting Your Computer

Code:
shutdown -r now
If you have installed a dual-boot system and you want to use the other operating system, (why would you want to do that?) you would use this command. You will get a similar message as with the -h (halt) option that will say something like:

System going for reboot NOW

The basic reason behind all of these messages is that Linux was conceived to be a networked operating system. You have people at workstations on the network busily doing their work. The last part of the shutdown commandnow is fine for a single-user home PC, but on a network system this would be changed to indicate a time. That way people would have a chance to finish what they were doing before the system went down for maintenence. Using 'now', in a network, would probably be hazardous to the health of the person who sent that command.

The next time you shutdown your system, you may want to try using some time options instead of just now. For example, you may want to try shutting down the computer at a given time.

Code:
shutdown -h 20:01
Which will shutdown the computer at 8:01 PM. You could also try:

Code:
shutdown -h +5
That shuts down the computer in 5 minutes time.

Now you know the correct way to shutdown your Linux system.
Thanks
 

NightsLast

New Member
its amazing
other than an advertisement.... what is it and what distro of Linux does it run?
Edited part....
ARM mbed OS is a platform operating system designed for the internet of things...
so basically its a phone charging 2 way radio that doesn't give you service in areas you bought it for unless someone else that has cell service and one of those devices and is within 10 miles of you..
so the next 2 questions are.... 1) what does it have to do with day to day Linux use? 2) what is so amazing about it?
 
Last edited:

atanere

Well-Known Member
i want to delet windows and want to install linux
Hi Muhammad, and welcome to the site. Instead of posting a new question on someone else's thread, please open a new thread of your own and post your question there. The Getting Started forum would be a good place. There are a number of folks who will be glad to help you. Thanks!
 

atanere

Well-Known Member
thanks :)
that was a typo in the query.
I typed it correct but I already had a timed shutdown command running which was why the shutdown command didn't work. Figured it out :D
Just getting to start with linux and Its fun :)
Great! We all think it's a lot of fun too. Glad to have you aboard, and feel free to open up a new thread if you have any questions to ask.

Cheers
 

DanB

New Member
Great information! I just finished first level red hat linux, getting ready to start second level in a few days. These tutorials put a lot of things I was confused about into perspective. Much appreciated!
 

wizardfromoz

Super Moderator
Staff member
Gold Supporter
If I am in Terminal, and wish to exit/reboot, I often use

Code:
init 6
or preface that with "sudo" for Ubuntu.

Comments welcome, and

Avagudweegend

Chris Turner
wizardfromoz
 

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