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Execute a .jar from the command line – java -jar usage, fixing ‘no main manifest attribute’ and UnsupportedClassVersionError, plus running JARs as services.
Execute a .jar from the command line – java -jar usage, fixing 'no main manifest attribute' and UnsupportedClassVersionError, plus running JARs as services.
Full SMTP reply code reference – what 4xx and 5xx errors mean, the common bounce codes (550, 554, 421), enhanced status codes, and how to fix each one.
Full SMTP reply code reference – what 4xx and 5xx errors mean, the common bounce codes (550, 554, 421), enhanced status codes, and how to fix each one.
Can’t upgrade Ubuntu because /boot is full? Safely remove old kernels with autoremove, fix a broken apt when /boot hit 100%, and prevent it recurring.
Can't upgrade Ubuntu because /boot is full? Safely remove old kernels with autoremove, fix a broken apt when /boot hit 100%, and prevent it recurring.
Raise upload_max_filesize and post_max_size on Ubuntu – find the right php.ini, the three settings that must agree, restart commands, and verification.
Raise upload_max_filesize and post_max_size on Ubuntu – find the right php.ini, the three settings that must agree, restart commands, and verification.
Learn how to retrieve HTTP response headers using file_get_contents() in PHP. A simple and lightweight alternative to cURL for inspecting headers.
Learn how to retrieve HTTP response headers using file_get_contents() in PHP. A simple and lightweight alternative to cURL for inspecting headers.
