Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Multi-line string in Ruby
Answer:
To declare a multi-line string in Ruby, it is as easy as the following.
sql = "
SELECT *
FROM `user` AS u
JOIN `company` AS c
ON u.cid = c.id
WHERE u.id = 8
"
puts sql
Enable gzip compression in Nginx
Answer:
Enabling gzip compression for text based output such as HTML can greatly improve the response of user.
If you are using nginx, it is easy by adding the following lines in your nginx.conf
gzip on;
gzip_min_length 1000;
gzip_proxied expired no-cache no-store private auth;
gzip_types text/plain text/html text/css application/json application/x-javascript text/javascript text/xml application/xml;
Print the web site's content using wget
Answer:
To show the web site's content in command line, just one command with wget.
# wget -q -O- http://www.example.com
Easy enough?
Cross platform newline in PHP
Answer:
In PHP, if you want to print out a newline character, you can use the "\n" character
<?php
echo "Hello World\n";
But the \n" character only work in Linux/UNIX, to make it work for both Windows, Mac and Linux/UNIX platforms, you can use a special constant PHP_EOL.
<?php
echo "Hello World" . PHP_EOL;
Upgrade Packages in Ubuntu
Answer:
From time to time, packages will release new version so your installed packages will also need to keep updated.
To upgrade your system, first update your package index by
# sudo apt-get update
Than upgrade the packages
# sudo apt-get upgrade
