Server Administration
Add a Swap File to a Small Server
Add a swap file to a small server and a memory spike stops killing your processes. fallocate reserves the file, mkswap formats it, swapon…
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Tag: Administration
Server Administration
Check Disk, Memory and CPU Usage From the Terminal
Diagnose a struggling Linux server in under a minute with df, du, free and top - which resource is short, and which directory or…
Programming
Create a WordPress Settings Page With the Settings API
Build an admin settings screen the way WordPress intends: add_options_page for the menu, register_setting with a sanitize callback, and a form that options.php saves…
Server Administration
Rotate Logs With logrotate
A log file that grows forever will eventually fill the disk. Write a logrotate config that renames, compresses and expires old copies, test it…
Server Administration
Set File and Directory Permissions With chmod
Set file and directory permissions with chmod, numerically and symbolically, and you control exactly who can read, write, or execute anything on a Linux…
Database Administration
Write a Subquery in MySQL
Write a subquery in MySQL to answer a question inside a question - a SELECT nested in another statement's WHERE or column list. This…