asrarak

* LFCS Domains 2015.02
  Note - the domains will change somewhat in March 2015. SW RAID
  with mdadm will be removed

** The Command Line
*** Editing text files on the CLI
    Covers the use of the basic text editors nano and gedit as well
    as the advanced editors _vi_ and _emacs_
    - nano
      simple CLI-based text editor

ruanbekker

My Elasticsearch cheatsheet with example usage via rest api (still a work-in-progress)

Shortlinks:

• Cluster Health
  • Index Level
  • Shard Level
• Nodes Overview
• Indices Overview
• Cluster Maintenance

hvelarde

# get total requests by status code
awk '{print $9}' /var/log/nginx/access.log | sort | uniq -c | sort -rn

# get top requesters by IP
awk '{print $1}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | head | awk -v OFS='\t' '{"host " $2 | getline ip; print $0, ip}'

# get top requesters by user agent
awk -F'"' '{print $6}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | head

# get top requests by URL

pvalkone

# Create 4K sector gnop(8) devices for the first disk of each of the three vdevs
$ sudo gnop create -S 4096 /dev/label/disk1 /dev/label/disk5 /dev/label/disk8
 
# Create the backup pool using three RAID-Z1 vdevs
$ sudo zpool create backup raidz /dev/label/disk1.nop /dev/label/disk2 /dev/label/disk3 /dev/label/disk4
$ sudo zpool add backup raidz /dev/label/disk5.nop /dev/label/disk6 /dev/label/disk7 /dev/label/disk12
$ sudo zpool add backup raidz /dev/label/disk8.nop /dev/label/disk9 /dev/label/disk10 /dev/label/disk11
 
$ zpool list  
NAME     SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT