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Essential skills for understanding instructions / Guide for new members
« Last Post by Keith on Yesterday at 04:16:45 pm »
Your posts
Most of the people who reply to your questions will not be professional computer experts, but just Linux users with more experience than you.  They will have other calls on their time (like a job or family) so please be patient if answers don’t appear immediately. 

Remember that there is no such thing as a “daft” question on this Forum.  All contributors have gone through the same learning curve as you have embarked upon, so don’t be reluctant to ask a question, no matter how simple it seems. 

Provide essential information in your post
Readers of your post are not clairvoyant and will have no idea of your system setup, so please always include enough information for them to place your questions in context.  For example;  the make/model of your computer - and your printer/device also if that’s the subject of your post. 

Key combinations
You will often be asked to type or paste “key combinations” as part of an instruction.  It means that you press one key whilst already holding down one or more other keys.  If you have used office software to create documents you are already familiar with the process.  For example: Ctrl+c and Ctrl+v for cutting and pasting.  And you select text by clicking-and-dragging your cursor over the text to be highlighted for copying. 

It’s the same process in the Terminal (see the next paragraph) except that for historical reasons (you can ask if you’re interested) the key combinations are Ctrl+Shift+c and Ctrl+Shift+v for copy and paste, respectively. 

The Terminal
Almost all the advice you receive will involve entering commands into your computer using the “Terminal”.  This is simply an application which is just a blank, black window into which you type or paste instructions that you are given. 

You invoke the Terminal by either:
1. searching the menu for “Terminal” or, more simply…
2. entering Ctrl+Alt+t on the keyboard.

Initially, the only text on the terminal screen will be your user prompt.  Here’s mine:
[email protected]:~$
Before the “@” is my computer user-name and “T500” is the name I’ve given my computer. 
The “~” means you are set at your Home Directory and the “$” just marks the end of the prompt.  The user prompt will change to reflect which directory you are in at any time. 

Entering commands
Most of the commands that you will be asked to enter into the Terminal will be provided in a reply-post in the “code” box.  In copying the command it is safest to highlight it by clicking on [Select] just above the code box, then copying it using Ctrl+c. 

The computer has no idea when you have finished entering your instruction until you tell it by pressing the “Enter” key.  Many new users are not aware of this. 

Most of the commands that you encounter at first will appear almost magical in their brevity.  Don’t worry about that – all will become clear with practice, and by you asking for explanations.  Beware, though, that the Linux Command Line is addictive! 
Forum Rules / Forum Rules
« Last Post by Keith on Yesterday at 03:32:13 pm »
The Forum Rules are mostly about respect for others and not abusing the function of the Forum. So:

1. Bad language – even of an apparently mild  nature – is deprecated.  If you want to emphasise a point, the English language is certainly adequate to the task in simple, accurate terms and without the use of mi**ing letters.

2. Discourtesy towards others – not just Forum members – is deprecated also. 

3. Personal rants about anything will be actively discouraged. 

4. Controversial issues  such as race, religion, politics, etc. should be avoided. 

5. Derogatory comments.  Whilst comparisons between operating systems, hardware etc. can be useful, derogatory comments about specific ones are unnecessary and simply annoy their users.  Another form of discourtesy. 

6. Deliberate advertising.  Any form of advertising is not allowed.  This does not mean that one cannot comment about the pros & cons of something in the General Discussion Board, but keep it objective.

7. Accuracy and completeness in ones posts is not just helpful, it saves a responder wasting a lot of time misinterpreting the problem/question.  Always provide as much information as you can about the system you are having trouble with or want to discuss. 

These Rules are not fixed and may change from time to time. 
News and Events / Reorganise
« Last Post by Mad Penguin on Yesterday at 02:53:44 pm »
We're moving some of the Forums boards around a little .. bear with us ...
News and Events / Re: Raspberry Pi 400
« Last Post by Mad Penguin on May 07, 2021, 10:46:46 am »
Just as a follow up, there's a more in-depth review here;
General Discussion / Re: Ubuntu Prometheus issue
« Last Post by Mad Penguin on May 07, 2021, 10:42:04 am »
Hi, as this is an application specific issue you might find more relevant help on the Prometheus support forums.

Generally, it looks like your installation of Prometheus hasn't worked, the system service is trying to start "/usr/local/bin/prometheus" and getting a "permission denied" error. This would indicate that the file you are trying to execute (/usr/local/bin/prometheus) isn't marked as an executable file. If the issue is as simple as the installer not setting the correct permissions, you could rectify this specific issue with;

Code: [Select]
sudo chmod +x /usr/local/bin/prometheus
However I would recommend you investigate "why" the file has apparently been set with the wrong permissions in the first place.
Sometimes directly fixing an apparent error doesn't always solve the "problem".
Hardware Compatibility / Dual LAN IDO-SBC2D06-V1A with SigmaStar SSD201 SOC
« Last Post by daletimwood on May 07, 2021, 09:49:16 am »

Needing some advice on how I might boot this SBC board from Industrio, perhaps using a similar Armbian image for a dual lan, dual cortex-a7 ?

Original Linuxgizmos post (which is a bit misleading since this is a dual ethernet IOT board, not a router):

Industrio documentation (including link to Baidu files, but you have to be a Baidu member to get your hands on them): which includes a compiler walkthrough.

Any tips on what kind of RTC battery is needed also welcome.
Other help & advice / Re: NTFS partition on Ubuntu
« Last Post by wishbone on May 04, 2021, 07:31:00 pm »
On the odd occasion that I`ve had a problem with not booting, I always use the Boot Repair Disk. This might not work for this problem, but it`s worth a try.
Other help & advice / Re: NTFS partition on Ubuntu
« Last Post by Keith on May 04, 2021, 12:12:24 pm »
Interesting that Nautilus file manager sees all the drives but the df command sees only Mark's drive. 
Looks like you'll have to attempt a Grub repair after all.  Perhaps Rich can help with that.

This URL looks like it might help with a repair:  You'll need to scroll down to "Reinstall Ubuntu GRUB Boot Loader". 
I found here the statement: "Usually, you should install the boot loader on your first machine hard disk MBR, which is /dev/sda in most cases. " - which might be relevant in your case.

Other help & advice / Re: NTFS partition on Ubuntu
« Last Post by Frustrated on May 04, 2021, 11:44:09 am »
This is the output

[email protected]:~$ df | grep sd
/dev/sdb2      451651100 195440868 233244632  46% /
[email protected]:~$
General Discussion / Ubuntu Prometheus issue
« Last Post by foufou-barnet on May 03, 2021, 02:13:44 pm »
Hey guys, i am new to ubuntu and wonder if someone can help me, i have installed prometheus and node_exporter and keep getting the following message when starting node_exporter

node_exporter.service - Prometheus
     Loaded: loaded (/etc/systemd/system/node_exporter.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Mon 2021-05-03 21:02:40 CST; 10min ago
    Process: 1825 ExecStart=/usr/local/bin/prometheus --config.file /etc/prometheus/prometheus.yml --storage.tsdb.path /var/lib/prometheus/ --web.c>
   Main PID: 1825 (code=exited, status=203/EXEC)

May 03 21:02:40 Foudel-168353976252 systemd[1]: Started Prometheus.
May 03 21:02:40 Foudel-168353976252 systemd[1825]: node_exporter.service: Failed to execute command: Permission denied
May 03 21:02:40 Foudel-168353976252 systemd[1825]: node_exporter.service: Failed at step EXEC spawning /usr/local/bin/prometheus: Permission denied
May 03 21:02:40 Foudel-168353976252 systemd[1]: node_exporter.service: Main process exited, code=exited, status=203/EXEC
May 03 21:02:40 Foudel-168353976252 systemd[1]: node_exporter.service: Failed with result 'exit-code'.

can someone please help
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