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Most modern Linux distributions documentation specify using kill-HUP <processID> to send the SIGHUP signal. [3] Daemon programs sometimes use SIGHUP as a signal to restart themselves, the most common reason for this being to re-read a configuration file that has been changed.
This file contains a "snapshot" of useful low-level information about the system that can be used to debug the root cause of the problem and possibly other things in the background. If the user has enabled it, the system will also write an entry to the system event log.
The magic SysRq key is a key combination understood by the Linux kernel, which allows the user to perform various low-level commands regardless of the system's state. It is often used to recover from freezes , or to reboot a computer without corrupting the filesystem . [ 1 ]
The second-stage loader (stage2, the /boot/grub/ files) is loaded by the stage1.5 and displays the GRUB startup menu that allows the user to choose an operating system or examine and edit startup parameters. After a menu entry is chosen and optional parameters are given, GRUB loads the linux kernel into memory and passes control to it.
Restart transfer from the specified point. RETR RFC 959 Retrieve a copy of the file RMD RFC 959 Remove a directory. RMDA Streamlined FTP Command Extensions: Remove a directory tree RNFR RFC 959 Rename from. RNTO RFC 959 Rename to. SITE RFC 959 Sends site specific commands to remote server (like SITE IDLE 60 or SITE UMASK 002).
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In most cases, it is possible to resume work and save files after a Recoverable Alert, while a normal, red Guru Meditation always results in an immediate reboot. It is, however, still recommended to reboot as soon as possible after encountering a Recoverable Alert, because the system may be in an unpredictable state that can cause data corruption.