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Eric Zarko ezarko

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ezarko / org.gnu.mailman.plist
Created August 26, 2015 22:27
OSX /Library/LaunchDaemons/
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>org.gnu.mailman</string>
<key>LaunchOnlyOnce</key>
<true/>
<key>Program</key>
<string>/usr/local/mailman/bin/mailmanctl</string>
@ezarko
ezarko / hex_sid_to_string.pl
Last active August 29, 2015 14:13
Converting a Security Identifier from hexadecimal to string. See http://codeimpossible.com/2008/04/07/Converting-a-Security-Identifier-from-binary-to-string/
#!/usr/bin/perl
$_ = join "", @ARGV;
s/^(0105)000000000005([0-9A-F]{40})$/$1$2/
or die "usage: $0 <28 hex pairs>";
print join("-", "S", unpack "c2 V4", pack "H*", $_)."\n"
@ezarko
ezarko / gist:36e32ecbc07b80b8f2e1
Created March 19, 2015 19:22
Add a tag "somekey" with "somevalue" to all EC2 instances that do not have that tag
aws ec2 create-tags --resources $(perl -MJSON -e '$d=[grep{$_->{State}{Name}eq"running"&&!$_->{Tags}{somekey}}map{map{$_->{Tags}={map{($_->{Key}=>$_->{Value})}@{$_->{Tags}}};$_}@{$_->{Instances}}}@{(decode_json scalar `aws ec2 describe-instances`)->{Reservations}}];print join(" ",map{$_->{InstanceId}}@$d)') --tags Key=somekey,Value=somevalue
@ezarko
ezarko / html.pl
Created November 19, 2010 18:25
Just some interesting regular expressions
# match a div with class header_bar
/\<div(?:\s+\w+\=\"[^\"]*\")*\s+class\=\"[\w\-\s]*\bheader_bar\b/;
@ezarko
ezarko / gist:01fdf47722cb6cd8873f
Last active October 1, 2015 19:51
Search static website generators
# search for Perl based projects updated in the last 3 months (as of 1/1/2015)
perl -MJSON -e '$d=decode_json scalar `curl https://staticsitegenerators.net/list.json 2> /dev/null`;print map {"$_->{name}\n"} grep {$_->{language} eq "Perl" && $_->{updated_at} =~ /^2015-0[789]/} @$d'
@ezarko
ezarko / get_instance_tags.pl
Created October 19, 2015 20:41
Fetch tags for an EC2 instance
#!/usr/bin/perl
use Data::Dumper;
use Digest::SHA;
use JSON;
use URI::Escape;
use XML::Simple;
use constant {
ENDPOINT => 'ec2.us-west-2.amazonaws.com',
@ezarko
ezarko / list_by_size.sh
Created October 22, 2015 22:00
List out the children of a directory in descending size order
du -shx * | perl -e '%x=qw/K 1000 M 1000000 G 1000000000/;print sort {$a=~/^(\d+(?:\.\d+)?)([KMG])\s/ or die $a;my@a=($1,$2);$b=~/^(\d+(?:\.\d+)?)([KMG])\s/ or die $b;my@b=($1,$2);$b[0]*$x{$b[1]} <=> $a[0]*$x{$a[1]}} <>'
@ezarko
ezarko / bootstrap_cfn-init.bash
Last active December 18, 2015 23:58
CloudFormation bootstraping for puppet
# 1) set up EPEL
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
# 2) install some dependencies
yum install -y pystache python-daemon python-lockfile
# 3) install aws-cfn-bootstrap
rpm -Uvh http://yum_server.example.com/yum/noarch/aws-cfn-bootstrap-1.4-8.3.el6.noarch.rpm
# 4) run cfn-init or signal error
/opt/aws/bin/cfn-init --region <Region> -s <StackId> -r db1 || /opt/aws/bin/cfn-signal -e 1 -r 'Failed to initialize server role using cfn-init' '<WaitHandle>'
@ezarko
ezarko / Docker and Express
Last active February 18, 2016 21:13
Simple express server application
You can add matic by adding "matic" and "jade" to the package.json, then add "RUN $(npm bin)/matic" to the Dockerfile.
I wonder if it would be as easy to add harpjs?
@ezarko
ezarko / docker-mariadb.bash
Last active May 20, 2016 16:30
Useful bash function for interacting with a mysql database in a mariadb docker container.
# mysql <container> [...]
function mysql {
docker run -it --link $1:mysql --rm mariadb sh -c "exec mysql -h\"\$MYSQL_PORT_3306_TCP_ADDR\" -P\"\$MYSQL_PORT_3306_TCP_PORT\" -uroot -p\"\$MYSQL_ENV_MYSQL_ROOT_PASSWORD\" ${@:2}"
}
# mysqladmin <container> [...]
function mysqladmin {
docker run -it --link $1:mysql --rm mariadb sh -c "exec mysqladmin -h\"\$MYSQL_PORT_3306_TCP_ADDR\" -P\"\$MYSQL_PORT_3306_TCP_PORT\" -uroot -p\"\$MYSQL_ENV_MYSQL_ROOT_PASSWORD\" ${@:2}"
}