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| bio | website | shawnjgoff.com |
|---|---|---|
| location | Tampa, FL | |
| age | 32 | |
| visits | member for | 2 years, 9 months |
| seen | 7 hours ago | |
| stats | profile views | 446 |
I've grown up with computers around me my whole life. I started programming when I was a kid, and stuck with it ever since. I came across Linux around 1999 and have enjoyed working with it ever since.
For a job, I get to write software that runs on embedded Linux devices. I do everything from working on low-level drivers to writing shell scripts and even web apps.
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Apr 18 |
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To display the selected part in line of text file It depends on why 3071 is special. Is it because of its position, or because it is exactly the value 3071, or because of what comes before or after it, etc? |
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Apr 17 |
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command OR script to detect vpn connection status You can ping your VPN gateway. So, if your gateway on the VPN is 172.16.1.1, the exit status of ping -c 1 -W 10 172.16.1.1 will tell you if you're connected. |
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Apr 12 |
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sourcing a file inside a script I just tried it; it works for me the way you were expecting. Are you sure your sourced script is setting LD_LIBRARY_PATH? You can add a line at the very end (or anywhere the script might exit) that echos it to a different temp file. |
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Mar 11 |
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Mouse clicks stop working after random time, using Awesome WM + Gnome I have experienced this same behavior in the past, so I don't think it's anything special about any your hardware. I did not have Gnome at the time. I currently have two systems with Awesome, and neither are showing that behavior. |
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Feb 28 |
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How do I begin with building a Linux system from scratch? You can configure grub to boot a Linux kernel. There are many places to find out how to do that; the most authoritative of which would be the official manual(gnu.org/software/grub/manual/grub.html). Once the kernel boots, it will attempt to start a program located at /sbin/init (unless configured otherwise). This program can do anything you want. There are some common options to use for /sbin/init, such as Upstart, sysvinit, systemd, or just bash. From there, that program is in control. If it ever exits, the kernel will crash, so it should be capable of starting other programs. |
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Feb 20 |
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using parallel to process unique input files to unique output files @JJones - monitor_workers is just like process_file - it's a function that does whatever you want. About the monitor - you were right; it should save the pids of its workers (so it can send a kill signal) and the counter needs to be incremented when it starts a worker. I've edited the answer to include that. |
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Feb 17 |
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Help with getting wifi up and running in Arch Linux on Mac Mini 3,1 @TomIngram You'll have to use wpa-supplicant (wiki.archlinux.org/index.php/WPA_supplicant). You should try and do as much as you can, and when you run into a problem, ask a new question. |
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Feb 17 |
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How to stop a program running as daemon I would add conditions to your statement. Don't use kill -9 unless you have tried other relevant signals or unless you know what the consequences of not allowing that process to terminate cleanly are and they are acceptable. |
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Jan 31 |
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What can make passing init=/path/to/program to the kernel not start program as init? Actually, it checks execute_command first, which comes from the kernel command line init= parameter. If it can't execute it, it prints a warning and tries to run init in various locations. This is in init/main.c in the function init_post(). I looked through the kernel printk messages and found the warning in my kernel's output, so now I have to figure out why it can't start /bin/sh or anything else that I try to start. |
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Jan 31 |
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What can make passing init=/path/to/program to the kernel not start program as init? It's not any distro - it's my own build; which is why I'm trying to debug the init scripts. |
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Jan 28 |
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What is Bash's string{ending1,ending2} construct called and what is the equivalent in zsh? Very strange; it's working for me now. I tried it before and it gave me some error, so I've been avoiding it for a month or so. |
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Jan 28 |
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How can I low-level format flash memory in Linux? It's not extraordinarily wrong to write /dev/zero to a flash device. The only advantage that writing 1s to the device gives is that you might get slightly faster write times the next time you write to the disk since it doesn't have to be erased first - and that depends on the flash translation layer being smart. |
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Jan 21 |
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Strange behaviour in recursive copy I think you have an extra cp -r 1/* 2/* in there - it's done twice in a row with (apparently) different results. It should always complain about not finding a 2/* because the shell can't expand that glob - nothing matches it.
And the contents of 1 is not copied to f in this example. |
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Jan 21 |
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Configure reboot on Linux kernel panic Yes, I'll be booting either to a different kernel, or giving the kernel a different rootfs path. There is a variable in the bootloader's config that gets changed when userspace boots successfully; if it doesn't change, it knows to try something different. I was hoping for something more than just the kernel command line for this because the bootloader's config can be modified by the Linux userspace. If there's a problem, it's likely that userspace started writing, then the device powered off; and there is a fallback default config for that; I'm still looking for the most solid I can get this. |
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Jan 21 |
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Configure reboot on Linux kernel panic Yes, I do have a watchdog. I'm just putting as many safety nets in place as possible. |
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Jan 20 |
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Configure reboot on Linux kernel panic grub is not on all systems; the one I'm working with is not using grub. My bootloader's config is stored in flash. |
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Jan 20 |
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Configure reboot on Linux kernel panic I'm looking for a kernel config option here, not something from userspace. Specifically, if for some reason, it can't mount the root filesystem (or for some other reason, userspace never comes up), I need it to reboot. |
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Nov 16 |
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How to find a file in the filesystem from the command line? There are options in some shells that pass the stars along to the program if they don't happen to match anything. Try creating a file in your current directory that is matched by that pattern, and try the command again. |
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Nov 16 |
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How to find a file in the filesystem from the command line? You need to quote or escape the *s to prevent the shell from interpreting them. |
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Nov 6 |
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How to run a command when a directory's contents are updated?incrond may also be of interest. |
