message

Syslog

1.0 Syslog

Syslog is a protocol for conveying event notification messages.

Syslog was first developed by Eric Allman for logging as a part of the Sendmail project in the 1980s. It soon became a de-facto standard for logging on Unix-like systems.… Read more

Message queue

POSIX message queues in Linux

1.0 POSIX Message queues


POSIX interprocess comunication (IPC) was introduced in the POSIX.1b standard (IEEE Std 1003.1b-1993) for real time extensions. POSIX message queues have been made available in Linux since the version 2.6.6 (May 2004). POSIX IPC calls are as per the standard but may not be available on older Unix-like systems.… Read more

System V message queues in Linux


1.0 Message queues

Message queues are one of the interprocess communication mechanisms available under Linux. Message queues, shared memory and semaphores are normally listed as the three interprocess communication mechanisms under Linux. Semaphores, though, are really for process synchronization. In practice, shared memory, aided by semaphores, makes an interprocess communication mechanism.… Read more

Error

kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

A new Linux kernel was built using the commands, make gconfig, make, sudo make install and sudo make modules_install. After building a new Linux kernel and booting from it, the boot process halts with the following message:

kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)


A lot many drivers are configured as loadable modules.… Read more