RJ-45自製網路線

測線器,一個發射端,一個接收端,上面8顆燈號

發射端會依序打出信號 1~8號燈,然後看接收器 1~8號燈 有沒有亮。

沒亮 = 線材中間斷蕊

亮的燈號順序不對 = 壓頭蕊線顏色排列錯誤,重壓

rj45

rj45-2

Reference: http://blog.xuite.net/axian/blog/224348022-%E8%87%AA%E5%B7%B1%E5%8B%95%E6%89%8B+DIY+RJ45+%E7%B6%B2%E8%B7%AF%E7%B7%9A%E6%8E%A5%E9%A0%AD%E5%90%A7%EF%BC%81

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SVN 1.8 on OSX (El Capitan)

UPDATE: 2015/10/27

For fresh install of El Capitan, Folks at HomeBrew has done the fine work for us.  From now we can just get it setup with brew.
brew install svn

 

UPDATE: 2014/10/27

Now we are in the era of OSX 10.10 (Yosemite) and the build method below is troublesome, particular with serf.

Folks at HomeBrew has done the fine work for us.  From now we can just get it setup with brew.
brew install subversion
this will get you subversion 1.8.10 at /usr/local/Cellar/subversion/1.8.10.1
As brew doesn’t override the system default, let’s do it ourself:


cd /usr/bin
ls -la svn*

You see the svn executables. Just rename and relink them. For example,


sudo mv svn svn1.7
sudo ln -s /usr/local/Cellar/subversion/1.8.10_1/bin/svn ./svn

Finally, force brew to link and overwrite all conflicting files:

brew link --overwrite subversion

 

This post is about how to compile the latest SVN source (1.8.3) on OSX Mavericks (OSX 10.9).

References

Sam’s Updating to SVN 1.8 for Mac OSX 10.8. This is about building in OSX 10.8.

Requirement

  1. Xcode command line tool: can be download at Apple’s dev center or install command line tool without Xcode.
  2. Setup the Tool chain:
    sudo ln -s /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/ /Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.9.xctoolchain
    The key is to link the toolchain to reflect new version # of Maverick, which is 10.9.
  3. The SVN source: can be download form Apache SVN project.
    Here’s straight way in command:
    cd ~/Downloads/
    curl -o subversion-1.8.3.tar.gz http://archive.apache.org/dist/subversion/subversion-1.8.3.tar.gz
    tar -xvf subversion-1.8.3.tar.gz

Build and Install SVN

Build serf

First we will need to build serf, included in the subversion package.
cd ~/Downloads/subversion-1.8.3
sh get-deps.sh serf
cd serf/
./configure
make
sudo make install

Build SVN

Go back up to the SVN source root, and build it using serf. Depend on your hardware, it might takes awhile. If you need a coffee, this is good time to do so once you start the make.

cd ..
./configure --prefix=/usr/local --with-serf=/usr/local/serf
make
sudo make install

Wrap it up

Now you’ve the new SVN 1.8.3 installed at /usr/local/bin. Make sure your path includes it. From there you should able to:
svn --version

And here you go:

svn, version 1.8.3 (r1516576)
   compiled Oct 24 2013, 02:38:35 on x86_64-apple-darwin13.0.0

Copyright (C) 2013 The Apache Software Foundation.
This software consists of contributions made by many people;
see the NOTICE file for more information.
Subversion is open source software, see http://subversion.apache.org/

The following repository access (RA) modules are available:

* ra_svn : Module for accessing a repository using the svn network protocol.
  - with Cyrus SASL authentication
  - handles 'svn' scheme
* ra_local : Module for accessing a repository on local disk.
  - handles 'file' scheme
* ra_serf : Module for accessing a repository via WebDAV protocol using serf.
  - using serf 1.2.1
  - handles 'http' scheme
  - handles 'https' scheme

Mac: Reset home folder permissions

This is for Mountain Lion.

http://www.fixkb.com/2011/08/reset-home-folder-permissions.html

  1. In Terminal, type sudo bash and press Enter.
  2. You will need to enter your password and press Enter.
    • It won’t show any characters when you type.
    • If you do not have a password then set one first.
  3. Type in the following (case-sensitive), pressing Enter at the end of each line.
    Replace “username” with the name of your home folder.
    sudo chmod -R -v -N ~
    sudo chown -R username:staff ~
    sudo chmod -R -v 700 ~
    sudo chmod -v 755 ~

MySQL 5.x Repair Cheat Sheet

If you upgrade MySQL or move the database around, you are most likely need to do those operations:

Backup

mysqldump -u root -p --default-character-set=utf8 databasename > data.sql

Restore

mysqldump -u root -p --default-character-set=utf8 databasename < data.sql
if database is larger then 100MB, this works better:
mysql -u root -p
#mysql> use the_database
#mysql> source data.sql

Check, Repair & Optimize All Tables in All Databases

If you need database server up, use mysqlcheck:
mysqlcheck -u root -p --auto-repair --check --optimize --all-databases

Or you can make it offline and do a better check:
service mysqld stop
myisamchk /var/lib/mysql/the_database/*.MYI
service mysqld start

Repair single table

mysql -u root -p
#mysql> use the_database
#mysql> repair table the_table

Reference:
http://www.felipecruz.com/repair-mysql-database.php