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How to find out which processes are using swap space in Linux?
...find-out-what-is-using-your-swap/
Here's one variant of the script and no root needed:
#!/bin/bash
# Get current swap usage for all running processes
# Erik Ljungstrom 27/05/2011
# Modified by Mikko Rantalainen 2012-08-09
# Pipe the output to "sort -nk3" to get sorted output
# Modified by Marc Me...
libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...所有的curl 程序都要频繁的使用它.它告诉curl库.程序将有如何的行为. 比如要查看一个网页的html代码等.(这个函数有些像ioctl函数)参数:
1 CURL类型的指针
2 各种CURLoption类型的选项.(都在curl.h库里有定义,man 也可以查看到)
3 parameter...
Add only non-whitespace changes
... if you have a handy alias to execute a bash command in the working tree's root. The incorrect formulation is:
sh = !bash -c '"$@"' -
While the correct one is:
sh = !bash -c '\"$@\"' -
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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
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Note, MySQL doesn't allow default values on TEXT/BLOB columns. Otherwise this is the ideal solution
– Andrew Vit
Mar 20 '13 at 18:35
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How do I install package.json dependencies in the current directory using npm
I have a web app: fooapp . I have a package.json in the root. I want to install all the dependencies in a specific node_modules directory . How do I do this?
...
Image fingerprint to compare similarity of many images
...on histogram on the canvas and compare that polygon in your database (e.g. mySQL spatial ...)
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Django - How to rename a model field using South?
...e slower than the 'rename_column' that other people have suggested. I know MySQL can do a "ALTER TABLE ... rename column" (or whatever it is) quite quickly.
– Rory
Jul 18 '11 at 10:01
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What is the difference between SQL, PL-SQL and T-SQL?
... by almost all relational database management systems: SQL Server, Oracle, MySQL, PostgreSQL, DB2, Informix, etc.
PL/SQL is a proprietary procedural language used by Oracle
PL/pgSQL is a procedural language used by PostgreSQL
TSQL is a proprietary procedural language used by Microsoft in SQL Server....
How can I have ruby logger log output to stdout as well as file?
...can do:
# config/environment/production.rb
file_logger = Logger.new(Rails.root.join("log/alternative-output.log"))
config.logger.extend(ActiveSupport::Logger.broadcast(file_logger))
Or if you're on Rails 3, you can backport it:
# config/initializers/alternative_output_log.rb
# backported from r...
What is the difference between “Class.forName()” and “Class.forName().newInstance()”?
...;
}
But there were also buggy JDBC drivers, starting with the org.gjt.mm.mysql.Driver as well known example, which incorrectly registers itself inside the Constructor instead of a static block:
package com.dbvendor.jdbc;
import java.sql.Driver;
import java.sql.DriverManager;
public class BadDri...