https://blog.garhve.com/posts/ Recent content in Posts on blog | garhve's hub Hugo -- gohugo.io en-us Sat, 03 Sep 2022 14:33:37 +0800 https://blog.garhve.com/posts/4/ Sat, 03 Sep 2022 14:33:37 +0800 https://blog.garhve.com/posts/4/ Description Modern microcontrollers nowadays support at least two privilege levels. Intel/AMD x86-64 family supports 4 levels, whilst ARM (32bit) microcontrollers support up to 7 levels (6 privileged, 1 non-privileged). Modern operating systems support at least 2 levels: User space: For applications to run in unprivileged user mode Kernel space: For the kernel (and all its components) to run in privileged mode – kernel mode Address of these 2 spaces are separate. https://blog.garhve.com/posts/3/ Thu, 25 Aug 2022 13:40:56 +0800 https://blog.garhve.com/posts/3/ Crontab crontab is a useful tool, I really regret that I don’t familar it earlier. It’s usage really simple, and these two are my frequent using: crontab -e #edit crontab file that reside in /var/spool/cron crontab -l #list current crontab job It basic syntax as follow, also really simple example of usage: delete file foo every minute * * * * * rm foo delete file foo every 15 minutes 15 * * * * rm foo delete file foo every beginning of hour 0 * * * * rm foo delete file foo every minute after 3 hours * 3 * * * rm foo delete file foo every day at 18:30 30 18 * * * rm foo delete file foo every beginning of month 0 0 0 * * rm foo delete file foo on beginning of 1st,10th of month 0 0 1,10 * * rm foo The usage really simple, I now use it to renew my SSL certification and daily update bt-tracker. https://blog.garhve.com/posts/2/ Wed, 10 Aug 2022 19:24:59 +0800 https://blog.garhve.com/posts/2/ In order to build a website for myself, I rent a server from Tencent. This is my final decision, the process is turtuous… My requirement as below: abroad provider because they don’t have to register.. the the budget’s not relax, all I can choosing was in range of $0 - $10. It can runs Arch linux seamlessly I already eye on one: Linode. But they don’t see me… and banned all my gmail account from their service… https://blog.garhve.com/posts/1/ Wed, 10 Aug 2022 17:21:02 +0800 https://blog.garhve.com/posts/1/ So now I can say my website is on.. even though it just literally has nothing but a printing hello I got this garhve.com domain on namesilo for $9.95 per year, it’s really cheap! I always want a domain that is .com suffix. Now, the web is https, this is a bit difficult for me. Due to personal interest, I didn’t choose frame to base my website. I use Nginx but I don’t familiar with it.