Raspberry Pi Forums

Bosse_B

I have a general scripting question: Say that I have a variable appargs which is set by appargs=$@ So now it holds all of the command line options entered when the script started. When I want to test this (not using getopts) for example like this: if [ -z $appargs ] then echo "Missing options!&...

Bosse_B

So I think I nailed it now! The problem seems to be the way getopts gets its input. The last argument to the getopts call is optional and if missing getopts reverts to use the full command line arguments as given by $@. But this seems not to work inside a function , so what I did was this: #!/bin/ba...

Bosse_B

It seems not to like getopts being in a function. Possibly the arguments list is reset for a function call, though I'm not aware of that. .... Edit - you can use getopts in a function, see https://stackoverflow.com/questions/16654607/using-getopts-inside-a-bash-function but it's a much more complic...

Bosse_B

Greg Erskine wrote: ↑
Wed Apr 15, 2020 11:18 pm
I think a ) should be a)

c doesn't equal "a " but "a"

I have tried both a ) and a), no difference.
I started out without the space, then I saw the space in one on-line example and tried that, to no avail.

Bosse_B

It seems like I am hunted by ghosts when writing scripts... I cannot get the getopts function to work properly. So I have shifted to a test script just in order to get the argument parsing with getopts working. But it is not. Here is my parsetest.sh script: #!/bin/bash function showhelp { echo "...

Bosse_B

Thanks, I will look over the existing script, currently it is 231 lines (lots of comments).
Good ideas here!

Bosse_B

Thanks all! I think I will use the case structure to handle the various commands. Did not know it was available. It is very confusing when to use == and when not to... As well as how to nest if, else, elif, fi etc... Question regarding case usage (I have looked up instructions on the net): I want to...

Bosse_B

I am trying to multi-purpose a script I have used to install a development IDE such that I can command it to select parts of the install depending on an input argument. I have studied a lot of tutorials on bash scripting but I simply cannot get this to work.. Please tell me what I am doing wrong in ...

Bosse_B

Thanks!
I think it is easy enough - it is working fine!

Bosse_B

I would like to log my external IP , i.e. the WAN IP address of the router, on an RPi4 unit, which sits on a mobile broadband connection. It seems like the external IP address changes frequently so I would like to create a log of the address. I can do all items in a script except I don't know how to...

Bosse_B

Thanks, I have read it and used further links and also googled "consoleblank".... But I have an issue here in that I suspect that most discussions are on how to enable the blanking or display shutdown which is the complete opposite of what I want. Also it seems as if the consoleblank param...

Bosse_B

I am hoping someone here can help me after I have looked for a solution for hours without success... How can one permanently disable the console screen saver on a server only ( no GUI installed ) system? I have hit this "saver" on an Ubuntu 16 server installation, which kicked in during th...

Bosse_B

It looks like there's a mod_perl2 handler -- a trivial google will find it -- which will render the thing before sending it to the browser, which should do what you want for reading. Otherwise, try a Wiki engine: most of them use a variant of it. Hmm, why mod_perl2? Should it not be mod_markdown or...

Bosse_B

Do you mean serve or render? Have you set the right MIME-type? Well, what I mean is: - I put the file LinuxCommands.md into a web dir on the server - I use the browser and open URL http://myserver.com/doc/LinuxCommands.md - The document is shown as an MD document fully rendered in my browser (not w...

Bosse_B

Yeah, this is basically what I have seen too. A local file system MD file renders OK (through the add-on) but not when served by apache2. I got to a state where Firefox will save the file to a local temp dir and then display it from there (if I set "open with" to Firefox). But then it is s...

Bosse_B

I have kept notes in a txt file on my computer on various Linux issues I have encountered when working on RPi projects. Now I have converted it to a markdown document (extension md) in order to make it easier to navigate and read. It works fine in Windows 10 when I drop it onto my Firefox browser (w...

Bosse_B

In my case I keep the backed up data on a (smaller) SDcard, which is a clone of the active SDcard. It took 24 min to create it using rpi-clone and I have verified that it is OK by running it in the RPi4. Then I have reverted to the original SDcard and continued working on the RPi4. Now I can back it...

Bosse_B

I just checked what happens when there is a network cable attached to the RPi4. Result: Both eth0 and wlan0 are now connected with different IP addresses on the same local network, i.e. the RPi4 has become dual-homed. Not what I wanted. ... Whilst that's not what you wanted, OOC why is it a "p...

Bosse_B

I just checked what happens when there is a network cable attached to the RPi4. Result: Both eth0 and wlan0 are now connected with different IP addresses on the same local network, i.e. the RPi4 has become dual-homed. Not what I wanted. So I have tried to add a check script to the boot sequence as s...

Bosse_B

1. no connection = no ssh 2. as i said, put the wpa file in boot. Why in /boot? The WiFi configuration is already present in /etc/wpa_supplicant/ And any such file in /boot will be erased on first boot after it was put there. 3. Ethernet is always used first, the preferred, so it doesn't matter if ...

Bosse_B

i'm not sure i get where your going, ethernet always works when connected. I do know this and it will be my preferred connection on this headless RPi4. However, if it is not possible to connect a wire to the router but a known WiFi is available, then I want it to connect to the WiFi instead if ther...

Bosse_B

Can I set up my Rpi4 (with Raspbian Buster Lite) such that it on boot will connect eth0 and then only if eth0 does not connect fall back to WiFi? Like this: Ethernet is wired up and receives a DHCP connection on boot: don't look at WiFi at all. Ethernet is not connecting (no cable) then and only the...

Bosse_B

I have a weird problem I do not understand... I have set up my RPi4 to run as a backup server and OpenVPN server. This works well when connected to the internal router on the home LAN but when I connect the Ethernet cable directly to the fiber box eternet it winds up with the fallback address 169.25...

Bosse_B

What I did in the end was that I uninstalled ddclient and its dependencies, then again installed and this time I entered the requested information in the installation dialog. After it was done I opened the ddclient.conf file in nano and modified the settings according to my needs. I also made sure t...

Bosse_B

Thanks, I have now added the eth0 interface as well so it looks like this when using iptables-save: sudo iptables-save # Generated by xtables-save v1.8.2 on Sat Mar 7 16:32:10 2020 *nat :PREROUTING ACCEPT [3:467] :INPUT ACCEPT [3:467] :POSTROUTING ACCEPT [2:136] :OUTPUT ACCEPT [2:136] -A POSTROUTING...

Search found 1084 matches

Re: Scripting woes, cannot parse inut values properly..

Re: Scripting woes, cannot parse inut values properly..

Re: Scripting woes, cannot parse inut values properly..

Re: Scripting woes, cannot parse inut values properly..

Re: Scripting woes, cannot parse inut values properly..

Re: Scripting woes, cannot parse inut values properly..

Re: Scripting woes, cannot parse inut values properly..

Scripting woes, cannot parse inut values properly..

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How to read external IP address into a variable in a script?

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How to disable terminal screen blanking on non-GUI system?

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Re: Can apache on rpi4 serve markdown documents?

Re: Can apache on rpi4 serve markdown documents?

Can apache on rpi4 serve markdown documents?

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Re: RPi4 using WiFi only if Ethernet connection missing?

Re: RPi4 using WiFi only if Ethernet connection missing?

Re: RPi4 using WiFi only if Ethernet connection missing?

Re: RPi4 using WiFi only if Ethernet connection missing?

RPi4 using WiFi only if Ethernet connection missing?

RPi4 gets IP address from router mut not when directly on ISP

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Re: IPTABLES routing syntax question