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dohsimpson / install-docker.sh
Last active August 29, 2015 14:23
Install docker and docker-compose on Ubuntu 14
#!/bin/bash
set -e
KERNEL_VERSION=`uname -r` # make sure kernel version >= 3.10
if [[ $KERNEL_VERSION != *"3.1"* ]]; then
echo "Kernel version must be >= 3.10"
fi
# for ubuntu 14: there's nothing required to install
# for ubuntu 12
@dohsimpson
dohsimpson / learn-django.txt
Last active October 26, 2018 15:08
Learn Django
Django
Model:
Class Based Model:
* class MODEL(models.Model):
FIELD1 = models.AFIELD([FIELDNAME], [default=VALUE])
def __str__(self):
...
Fields:
@dohsimpson
dohsimpson / gist:68a4b792c9c84c1d5238
Last active August 29, 2015 14:24
Watch File
# execute command when file changed
#!/bin/bash
set -e
prev_cs=""; while true; do
cur_cs="`md5sum $*`"
if [ "$cur_cs" != "$prev_cs" ]; then
rake # change to your command
@dohsimpson
dohsimpson / sVimrc
Last active June 13, 2018 14:32
" Scroll
map "j" scrollPageDown
map "k" scrollPageUp
map "left" scrollLeft
map "right" scrollRight
map "space" scrollFullPageDown
map "b" scrollFullPageUp
" Tab
map "s" nextTab
@dohsimpson
dohsimpson / public keys
Last active June 13, 2017 14:38
Work
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCk/eYwgSbnJEH8338x77vBmZIYvt3YWLKw9U19fiqHuoO/hBlCuclaZtTXru7GTAs6RIa4AGMHnrZixsVUyA+FmGVNRTl6stgM1//+OumZbKmjqtXzr8BeFa1B3IxhPxI6I0AAn2NCuVyn97mREX1XAesKFNMgRaLhFV5/E+W3fkCV1mz1X8uJihVtZxu+fI9Gnb1KjM2ARHBZRQvghhYuCi7kIl7TlWD9DbwNCC2Yk55PRj/bN7NxZxRHdDA/9q2XZU8LJi6oDgs6hwregXgjuoXd9mdi8XhY/JK8p3xRFhfQ8IHoxQJ6X3YYgu4ITreV81MwoH1Qx6QqoJ4hPdGn user@enting
Home (https://tinyurl.com/entingkey)
@dohsimpson
dohsimpson / Learning SA Stuff.markdown
Last active November 15, 2018 17:46

Networking Tools

netstat

  • -i interface config info (use ifconfig -a on Linux for verbose interface info)
  • -a all ports(listening and non-listening)
  • -l all listening ports
  • -t listening TCP ports
  • -p display PID and program names
  • -c it's like watch
  • -rn list routes but don't resolve ip
  • -n numeric ports
@dohsimpson
dohsimpson / PostgreSQL Commands.markdown
Last active July 27, 2017 15:02

Built-in Functions

about

  • version(): get the version of the DB server

datetime

  • date_trunc('second', TIMESTAMP): remove the milleseconds
@dohsimpson
dohsimpson / RHCE.markdown
Last active September 24, 2017 13:33
RHCE

Useful knowledge

Command Line

  • \CMD: run CMD in a sub-shell? (useful for not using .bashrc or .zshrc which might have alias)

System Performance Tools

top: general performance monitoring

  • press 1: toggle list cpu usage by cores (useful for understanding load average and io wait)
  • < and >: sort with prev or next colume (starts from cpu)
  • f (field): add or remove column, in top view, press W to save view to ~/.toprc
@dohsimpson
dohsimpson / gist:14eafc3dd82eb08bfb67e3e4fbf1d302
Last active November 9, 2018 05:21
Fuck Ansible
* `apt` cannot be followed by module name directory, have to use `name` option
* `import_playbook` is not a task, do not put under tasks
* Don't use `copy`, it is slow, use `synchronize` instead
* `shell` doesn't handle symlink chdir correctly, it's gonna chdir you to resolved path.
@dohsimpson
dohsimpson / emo-aware.txt
Created December 5, 2017 20:25
Emotional Awareness (Paul Ekman) Notes
* 3 kinds of meditation: distracted(not meditating); fixed point meditation; open meditation