gunzip filename.tar.gz

Followed by:

tar -xvf filename.tar

Generally you should untar things into a directory, or the present working directory will be the destination which can get messy quick.

View and Delete IPTable Rules:

http://www.thegeekstuff.com/2010/07/list-and-flush-iptables-rules/

https://www.digitalocean.com/community/tutorials/how-to-list-and-delete-iptables-firewall-rules

Drop traffic from an IP

https://www.linode.com/docs/security/firewalls/control-network-traffic-with-iptables

("I" Insert rule shown below, see link for more rule types)

$ iptables -I INPUT -s 114.80.215.81 -j DROP

In Terminal:
$ echo hRcZHqpT8Z9U/sjPqclyAw==|openssl des-ede3 -a -d -K 30794A21403124723870304C4072312436794A214031726A -iv 30794A2140312472; echo

(where the text in bold is your encrypted password)

https://gist.github.com/algal/5480916

https://gist.github.com/alexjs/4165271

https://michielkalkman.com/snippets/nginx-cors-open-configuration.html

http://enable-cors.org/server_nginx.html

http://blog.ionic.io/handling-cors-issues-in-ionic/

https://github.com/lynndylanhurley/ng-token-auth/issues/157

Check which keys are currently loaded.

$ ssh-add -l

Add a key file to your ssh list:

$ ssh-add #FULL_PATH#

EXAMPLES

chown root /u
Change the owner of /u to "root".
chown root:staff /u
Likewise, but also change its group to "staff".
chown -hR root /u
Change the owner of /u and subfiles to "root".

sudo kill $(cat /opt/nginx/logs/nginx.pid)

1. See the list of available editors.

   root@li1298-148:~# update-alternatives --list editor

2. Update the default to your vim installation.

   root@li1298-148:~# update-alternatives --set editor /usr/bin/vim.basic

Backup:
$ pg_dump -U {user-name} {source_db} -f {dumpfilename.sql}

Restore:
$ psql -U {user-name} -d {desintation_db}-f {dumpfilename.sql}

SELECT usename FROM pg_user;

sudo ln -s /etc/nginx/sites-available/example.com /etc/nginx/sites-enabled/example.com

SET PASSWORD FOR 'bob'@'%.example.org' = PASSWORD('cleartext password');

mysql -u root

Count number of records in array:
db.data_records.count( { dataset_id: { $in: [ 2509, 2224, 2128, 2145, 2472, 2249 ] } } )

Count number of records NOT in array:
db.data_records.count( { dataset_id: { $nin: [ 2509, 2224, 2128, 2145, 2472, 2249 ] } } )

Remove records NOT in array:
db.data_records.remove( { dataset_id: { $nin: [ 2509, 2224, 2128, 2145, 2472, 2249 ] } } )

⌃ Control
⌥ Option
⌘ Command
⇧ Shift
⎋ Escape
⌅ Enter
↩ Return
⌦ Forward Delete
⌫ Backward Delete
﹖⃝ Help
↖ Home
↘ End
⇞ Page Up
⇟ Page Down
⇥ Tab
⇤ Back-tab

HTML BUNDLES

Insert Open/Close Tag (⌃<) — this command will take the word just typed and change it into placing the caret in the middle. It will recognize those tags where a close tag is not allowed (like hr) and instead insert placing the caret after the tag.

Wrap Selection in Open/Close Tag (⌃⇧W) — this will put

…

COPY TO LOCAL MACHINE USING SSH
scp user@domain:remote_file_location local_file_location

ZIP FOLDERS RECURSIVELY:

zip -9 -r

-9: optimize compression
-r: recursive

ActiveRecord::Schema.define do
<>
end

vertical-align

vertical-align: middle

In Table Cells

In table cells (and in div with display: table-cell), this will work as expected. The content will be centered vertically.

In Inline Elements

It works like the old 'align' property. This means that it will KIND OF work the way you expect it.

For ALL Other Elements

Technically, it should not do ANYTHING on these elements.

var collectionNames = db.getCollectionNames(), stats = [];
collectionNames.forEach(function (n) { stats.push(db[n].stats()); });
stats = stats.sort(function(a, b) { return b['size'] - a['size']; });
for (var c in stats) { print(stats[c]['ns'] + ": " + stats[c]['size'] + " (" + stats[c]['storageSize'] + ")"); }

This works on Mac OSX 10.9

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2 --use-system-libraries

git branch -m <oldname> <newname>

If you want to rename the current branch, you can simply do:

git branch -m <newname>