Note Django

https://simpleisbetterthancomplex.com/2015/11/23/small-open-source-django-projects-to-get-started.html
https://python.web.id/blog/create-command-line-interfaces-with-python/

How to read source code

http://www.skorks.com/2010/05/why-i-love-reading-other-peoples-code-and-you-should-too/
http://wiki.c2.com/?TipsForReadingCode

Những thói quen xấu kìm hãm sự tiến bộ của lập trình viên

http://techtalk.vn/nhung-thoi-quen-xau-kim-ham-su-tien-bo-cua-lap-trinh-vien.html

Note Go

https://speakerdeck.com/mitchellh/advanced-testing-with-go
http://golanggo.com/archive
https://talks.golang.org/2016/applicative.slide#1
https://talks.golang.org/2014/organizeio.slide#1
https://talks.golang.org/2012/10things.slide#4
http://www.slideshare.net/InfoQ/experiences-building-influxdb-in-go
http://www.slideshare.net/InfoQ/beyond-the-hype-4-years-of-go-in-production
https://www.netlify.com/blog/2016/10/20/building-a-restful-api-in-go/
https://www.goinggo.net/2014/05/methods-interfaces-and-embedded-types.html

Some useful command

# lsmod
megaraid_sas           91199  26

# modinfo megaraid_sas

filename:       /lib/modules/3.13.0-92-generic/kernel/drivers/scsi/megaraid/megaraid_sas.ko

description:    LSI MegaRAID SAS Driver

author:         megaraidlinux@lsi.com

version:        06.700.06.00-rc1

# modinfo file.ko

# dpkg -c file.deb ( contains in deb )

# dpkg -x file.deb /tmp/file ( extract file in deb )

# dpkg -e file.deb ( extract control file, such as preinst, postinst, prerm, postrm )

Scan LVM partition

If your OS partition die, but data in other disks run LVM, you can reinstall OS and mount logical volume to use.

Example
# pvscan
  PV /dev/vdb   VG vgdata   lvm2 [20,00 GiB / 5,00 GiB free]
  Total: 1 [20,00 GiB] / in use: 1 [20,00 GiB] / in no VG: 0 [0   ]

# vgscan 

  Reading all physical volumes.  This may take a while...

  Found volume group "vgdata" using metadata type lvm2

# vgchange -a y

  1 logical volume(s) in volume group "vgdata" now active

# lvscan 

  ACTIVE            '/dev/vgdata/lvdata' [15,00 GiB] inherit

# mount /dev/vgdata/lvdata /mnt

DONE

Disable IPv6 when using apt-get

Sometimes when run command apt-get update, it connected to some repo using IPv6 address. But it made long delay because ISP's network was not ready for IPv6.
Config make use IPv4
- Add -o Acquire::ForceIPv4=true when run apt-get
- Make config persistent:

# echo 'Acquire::ForceIPv4 "true";' | tee /etc/apt/apt.conf.d/99force-ipv4