To copy file from you host computer to a container use command docker cp
docker cp file.txt ${CONTAINER_ID}:/root/file.txt
Replace ${CONTAINER_ID} with ID of the container. You can get container name using command:
docker ps -a
web development and system administration of Linux
To copy file from you host computer to a container use command docker cp
docker cp file.txt ${CONTAINER_ID}:/root/file.txt
Replace ${CONTAINER_ID} with ID of the container. You can get container name using command:
docker ps -a
Example of a virtual host for web server Apache version 2.4 config to run a development copy of WordPress CMS:
<VirtualHost *:81> ServerName wpdev.test ServerAlias *.wpdev.test # Indexes + Directory Root. DirectoryIndex index.php index.html DocumentRoot "/Users/taras/wpdev/public_html" ErrorLog "/usr/local/var/log/httpd/wpdev.test/error.log" CustomLog "/usr/local/var/log/httpd/wpdev.test/access.log" common <FilesMatch \.php$> SetHandler "proxy:fcgi://127.0.0.1:9074" </FilesMatch> Options FollowSymLinks </VirtualHost>
To list installed composer libraries use command below:
composer show -i
You can use ?: ternary operator in PHP then you need not empty value. Set value to a $action variable from $_POST[‘action’] parameter if it is not empty or use string default instead. It is shown in the example code below:
// Example usage for: Ternary Operator $action = (empty($_POST['action'])) ? 'default' : $_POST['action'];
For more information see PHP documentation page for Ternary Operator.
In PHP 5.3, a shorter syntax for the ternary operator was introduced, which allows to leave out the middle part of the ternary operator for a quick shorthand evaluation. It is also called the Elvis operator sometimes because:
Then I’ve developed MySQL backup script I’ve faced an error:
mysqldump: Got error: 1045: "Access denied for user '...'@'localhost' (using password: YES)" when using LOCK TABLES
which was fixed by adding
--lock-tables=false
parameter to mysqldump command.
Also, if you dump InnoDB tables consider using the
--single-transaction=true
parameter. As it is described in MySQL 5.7 documentation page.
To update WordPress CMS core, plugin and theme translations the following commands can be used:
# wp language plugin --all update # wp language theme --all update # wp language core update
All packages should be installed as a root administrator user.
Before we install anything new on a server, you should update your server packages:
# apt-get update && apt-get upgrade
Next, to install PHP 7.4 on Ubuntu 20.04, just run the following command:
# apt-get install php
To verify if PHP is installed, run the following command:
# php -v
These are the most common PHP 7.4 modules often used by php applications. You may need more or less, so check the requirements of the software you’re planning to use:
# apt-get install php-pear php-fpm php-dev php-zip php-curl php-xmlrpc php-gd php-mysql php-mbstring php-xml
PHP 8.1 is the newest PHP version released on 25 Nov 2021. You can start using it now. These are the instructions on how to install it on Ubuntu 22.04 or Ubuntu 20.04 (or any other Ubuntu).
To install PHP 8.0 you’ll need to use a third-party repository. We’ll use the repository by Ondřej Surý that we previously used.
First, make sure you have the following package installed so you can add repositories:
# apt-get install software-properties-common
Next, add the PHP repository from Ondřej:
# add-apt-repository ppa:ondrej/php
And finally, update your package list:
# apt-get update
After you’ve added the repository, you can install PHP 8.1 with the following command:
# apt-get install php8.1
This command will also install some additional packages:
And that’s it. To check if PHP 8.1 is installed on your server, run the following command:
# php -v
You may need additional packages and modules depending on your applications. The most commonly used modules can be installed with the following command:
# apt-get install php8.1-fpm php8.1-curl php8.1-dev php8.1-gd php8.1-mbstring php8.1-zip php8.1-mysql php8.1-xml
If you have multiple PHP versions installed on your Ubuntu server, you can change what version is the default one.
To set PHP 8.1 as the default, run:
# update-alternatives --set php /usr/bin/php8.1
To create a git patch file from the uncommitted changes in the current working directory use command:
git diff > filename.patch
In case some part of the work you’re doing are new files that are untracked and won’t be in your git diff output. So, one way to do a patch is to stage everything for a new commit (git add each file, or just git add .) but don’t do the commit, and then run:
git diff --cached > filename.patch
You can use the ‘binary’ option if you want to add binary files to the patch (e.g. mp3 files):
git diff --cached --binary > filename.patch
You can later apply the patch by running:
git apply filename.patch
Read more options at https://stackoverflow.com/questions/5159185/create-a-git-patch-from-the-uncommitted-changes-in-the-current-working-directory.
To undo last commit in git you can use the following command below:
$ git reset HEAD~
To display changes in the particular commit you can use the following command:
# git show COMMIT_HASH
You can find commit hash using one of the following commands:
# git log
… or by commit message text:
# git log --all --grep="commit comment message"
You can also find more information in git show documentation.