openssl x509 -in certificate.crt -text -noout
How to turn off php safe_mode off for a particular directory in a shared hosting environment?
Your service provider might have forgot to tell you that you need to enable your user defined php.ini configuration by adding this line in the .htaccess file that you find in your public_html folder:
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Tips: execute shell commands in php on Linux server
Php has multiple functions to do this task. Lets take a look at each of these
1. system
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Exim: usefull commands 2
Message-IDs and spool files
The message-IDs that Exim uses to refer to messages in its queue are mixed-case alpha-numeric, and take the form of: XXXXXX-YYYYYY-ZZ. Most commands related to managing the queue and logging use these message-ids.
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Disable or Enable crontab for specific user on Linux server
Most of the people use cron for scheduling tasks on hourly or daily basis. It is one of the very best tool which gives system administrators a lot of relief as computer can do their work when they are miles away from their systems.
Enabling/Disabling the cron for specific user is something which is not used by every person but could be useful for the system administrators or people who would like to put some restrictions on services which a normal user can use in a system.
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