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How to create a file in Linux from terminal window? [closed]
...t
nano /path/to/file or vi /path/to/file (or any other editor emacs,gedit etc)
It either opens the existing one for editing or creates & opens the empty file to enter, if it doesn't exist
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git-upload-pack: command not found, when cloning remote Git repo
...r cloning, which eliminates the need for --upload-pack on subsequent pull/fetch requests. Similarly, setting receive-pack eliminates the need for --receive-pack on push requests.
git config remote.origin.uploadpack /path/to/git-upload-pack
git config remote.origin.receivepack /path/to/git-receive-...
Rails raw SQL example
...s.rubyonrails.org/active_record_querying.html
and in associations, scopes, etc. You could probably construct the same SQL with ActiveRecord relational queries and can do cool things with ARel as Ernie mentions in http://erniemiller.org/2010/03/28/advanced-activerecord-3-queries-with-arel/. And, of c...
Xcode: What is a target and scheme in plain language?
...ects usually relate to one another
Project - Contains code and resources, etc. (You'll be used to these!)
Target - Each project has one or more targets.
Each target defines a list of build settings for that project
Each target also defines a list of classes, resources, custom scripts etc to incl...
Access mysql remote database from command line
...
edit my.cnf file:
vi /etc/my.cnf:
make sure that:
bind-address=YOUR-SERVER-IP
and if you have the line:
skip-networking
make sure to comment it:
#skip-networking
don't forget to restart:
/etc/init.d/mysqld restart
...
Difference between solr and lucene
...work.
Examples are Solr, Elastic Search, LinkedIn (yes, under the hood), etc..
Check out this article: Lucene vs Solr
UPDATE (6/18/14)
When to use Lucene?
You are a search engineer AND
You are a programmer AND
You want full control over almost all the internals of Lucene AND
Your requirements...
Why is String immutable in Java?
...ring in network connections, database connection urls, usernames/passwords etc. If it were mutable, these parameters could be easily changed.
Synchronization and concurrency: making String immutable automatically makes them thread safe thereby solving the synchronization issues.
Caching: when compi...
MySQL root access from all hosts
...tstat -tupan | grep mysql
Update For Ubuntu 16:
Config file is (now)
/etc/mysql/mysql.conf.d/mysqld.cnf
(at least on standard Ubuntu 16)
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Linux error while loading shared libraries: cannot open shared object file: No such file or director
...ies found in the directories specified on the command
line, in the file /etc/ld.so.conf, and in the trusted directories
(/lib and /usr/lib).
Usually your package manager will take care of this when you install a new library, but not always, and it won't hurt to run ldconfig even if that is not...
Why use AJAX when WebSockets is available?
...tive games, dynamic media streams, bridging to existing network protocols, etc).
However, there is certainly an overlap in purpose between WebSockets and AJAX/Comet. For example, when the browser wants to be notified of server events (i.e. push) then Comet techniques and WebSockets are certainly bo...