Want to use git to manage your wordpress installation and track changes of your development or wordpress upgrade?

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[root@localhost ~]# curl -L https://cpanmin.us | perl – -M https://cpan.metacpan.org -n Mojolicious

curl: (35) SSL connect error

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yiisoft/yii2 2.0.6 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.

How to fix?
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[root@dev html]# curl -sS https://getcomposer.org/installer | myphp
#!/usr/bin/env php
Some settings on your machine may cause stability issues with Composer.
If you encounter issues, try to change the following:

The apc.enable_cli setting is incorrect.
Add the following to the end of your `php.ini`:
apc.enable_cli = Off

The php.ini used by your command-line PHP is: /opt/php-5.4.37/etc/php.ini
If you can not modify the ini file, you can also run `php -d option=value` to modify ini values on the fly. You can use -d multiple times.

Downloading…

Composer successfully installed to: /opt/php-5.4.37/html/composer.phar
Use it: php composer.phar

1. find out changed files in a commit
e.g.
$ git diff-tree --no-commit-id --name-only -r 5ada787d6688d388c8cdeb0ce87bfc7ac209106f

2. add all untracked, modified, deleted files to a commit
$ git add -A

You use gii to create a CURD suite of code and got the error of

Unknown Class – yii\base\UnknownClassException

Unable to find ‘backend\controllers\xxxxxController’ in file: /opt/php-5.4.37/html/backend/controllers/xxxxxController.php. Namespace missing?
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How to upgrade Yii2 to the latest version? read on…
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$ perl -e ‘use DBD::mysql;’
Can’t load ‘/Library/Perl/5.18/darwin-thread-multi-2level/auto/DBD/mysql/mysql.bundle’ for module DBD::mysql: dlopen(/Library/Perl/5.18/darwin-thread-multi-2level/auto/DBD/mysql/mysql.bundle, 1): Library not loaded: libmysqlclient.18.dylib
Referenced from: /Library/Perl/5.18/darwin-thread-multi-2level/auto/DBD/mysql/mysql.bundle
Reason: image not found at /System/Library/Perl/5.18/darwin-thread-multi-2level/DynaLoader.pm line 194.
at -e line 1.
Compilation failed in require at -e line 1.
BEGIN failed–compilation aborted at -e line 1.
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what to download the latest complete flash player install file? note not the installer file which needs to download the real flash install file when performing the installation.
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two possibile reasons:

1. the file is locked, verify this in the file general info tab and make sure it is not locked.
Right click on the file => Get Info => in the “General” section, make sure the “locked” option is not checked.

2. there is a special case, when your file name contains ‘/’. this will cause the file to be opened as read-only by default (tricky!)