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kdump (Linux) – Linux kernel's crash dump mechanism, which internally uses kexec System.map – contains mappings between symbol names and their addresses in memory, used to interpret oopses References
(It may be possible to specify boot parameters which control the level of detail in the messages.) The booting process typically happens at a speed where individual messages scroll off the top of the screen before an operator can read/digest them. The dmesg command allows the review of such messages in a controlled manner after the system has ...
10.0–10.1: The system displays text on the screen, giving details about the error, and becomes unresponsive. 10.2: Rolls down a black transparent curtain then displays a message on a white background informing the user that they should restart the computer. The message is shown in English, French, German and Japanese.
The Linux console is a system console internal to the Linux kernel. A system console is the device which receives all kernel messages and warnings and which allows logins in single user mode. [1] The Linux console provides a way for the kernel and other processes to send text output to the user, and to receive text input from the user.
Thus, the kernel stage initializes devices, mounts the root filesystem specified by the bootloader as read only, and runs Init (/sbin/init) which is designated as the first process run by the system (PID = 1). [19] A message is printed by the kernel upon mounting the file system, and by Init upon starting the Init process. [19]
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Changes and prints terminal line settings tee: Sends output to multiple files test: Evaluates an expression timeout: Run a command with a time limit true: Does nothing, but exits successfully tty: Prints terminal name uname: Prints system information unlink: Removes the specified file using the unlink function uptime: Tells how long the system ...
In particular, the POSIX specification and the Linux man page signal (7) require that all system functions directly or indirectly called from a signal function are async-signal safe. [ 6 ] [ 7 ] The signal-safety(7) man page gives a list of such async-signal safe system functions (practically the system calls ), otherwise it is an undefined ...