uptime []

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uptime

CentOS

service httpd fullstatus

Ubuntu

apache2ctl fullstatus

Sometimes the correct packages are not installed to run these commands
Alternative:

grep -i resuming /var/log/httpd/error.log

grep -i resuming /var/log/apache2/error.log

You can use any of the following commands

mysqladmin  version | grep -i uptime

or

SHOW GLOBAL STATUS LIKE 'Uptime';

or

mysql -e 'SHOW GLOBAL STATUS LIKE "Uptime"' | grep ''[[:digit:]]'' | awk '{ print $2 / 60 / 60 / 24 " days"}'