Replace old text with new text Linux Command

On some occasions apache server will just fail, and become crashed, failing to restart with an error message like # tail /var/log/httpd/error_log [Sun Dec 22 10:05:27.006998 2013] [core:emerg] [pid 15001:tid 140145945569216] (28)No space left on device: AH00023: Couldn’t create the fcgid-proctbl mutex [Sun Dec 22 10:05:38.000403 2013] [core:emerg] [pid 15018:tid 140368783902656] (28)No space left on…

Listing sizes in AWS S3 Buckets Getting the whole bucket size aws s3 ls s3://$BUCKETNAME/ –recursive –human-readable –summarize | tail -n2 Tail is used because otherwise all files will be printed on screen (but you may want that for some reason). Getting the size of a specific directory/file You just need to add the path…

Introduction SQLi is the manipulation of a security flaw in database systems. WordPress, as a platform, runs server-side scripts in PHP and uses SQL databases. Hence, SQL and PHP make WordPress websites vulnerable to attackers. They could insert malicious URLs (which are embedded with commands) that trigger unwanted behaviors from your database. Consequently, your database’s…

Step 1 — Installing Nginx In order to display web pages to our site visitors, we are going to employ Nginx, a high-performance web server. To get the latest Nginx version, we’ll first install the EPEL repository, which contains additional software for the CentOS 7 operating system. To add the CentOS 7 EPEL repository, run…