un33k

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'

mboersma

python3 -c 'import sys, yaml, json; y=yaml.safe_load(sys.stdin.read()); print(json.dumps(y))'

andreyvit

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

marktheunissen

This playbook has been removed as it is now very outdated.

louiszuckerman

#!/bin/bash
 
if [[ "$#" < "2" || "$#" > "3" ]]; then
  cat <<END
Glusterfs GFID resolver -- turns a GFID into a real file path
 
Usage: $0 <brick-path> <gfid> [-q]

  <brick-path> : the path to your glusterfs brick (required)
  

KartikTalwar

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

• a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
• H: preserves hard-links
• A: preserves ACLs

alexeiz

diff -u -r a/CRT.c b/CRT.c
--- a/CRT.c     2012-10-19 14:59:28.000000000 -0400
+++ b/CRT.c     2013-01-28 12:08:36.812929000 -0500
@@ -562,7 +562,7 @@
       CRT_colors[LED_COLOR] = ColorPair(Green,Black);
       CRT_colors[TASKS_RUNNING] = A_BOLD | ColorPair(Green,Black);
       CRT_colors[PROCESS] = A_NORMAL;
-      CRT_colors[PROCESS_SHADOW] = A_BOLD | ColorPair(Black,Black);
+      CRT_colors[PROCESS_SHADOW] = A_BOLD | ColorPair(Green,Black);
       CRT_colors[PROCESS_TAG] = A_BOLD | ColorPair(Yellow,Black);

jjmaestro

#!/usr/bin/env python
# -*- coding: utf-8 -*-


def archive_to_bytes(archive):
    def to_seconds(s):
        SECONDS_IN_A = {
            's': 1,
            'm': 1 * 60,
            'h': 1 * 60 * 60,

plentz

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

denji

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.