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chroot is an operation on Unix and Unix-like operating systems that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name (and therefore normally cannot access) files outside the designated directory tree.
Immediately reboot the system, without unmounting or syncing filesystems b: x: b: b: Perform a system crash. A crashdump will be taken if it is configured. c: j: c: c: Display all currently held Locks (CONFIG_LOCKDEP kernel option is required) d: e: d: s: Send the SIGTERM signal to all processes except init (PID 1) e. e: f
For example in a system with an i.MX7D processor and a bootable device which stores the OS (including U-Boot), the on-chip boot ROM sets up the DDR memory controller at first which allows the boot ROM's program to obtain the SoC configuration data from the external bootloader on the bootable device. [5]
Typically, the system firmware (UEFI or BIOS) will allow the user to configure a boot order. If the boot order is set to "first, the DVD drive; second, the hard disk drive", then the firmware will try to boot from the DVD drive, and if this fails (e.g. because there is no DVD in the drive), it will try to boot from the local hard disk drive.
Namespaces may be used to create an isolated environment similar to chroot, but in a more secure way. [ 43 ] Plan 9's union directory architecture inspired 4.4BSD and Linux union file system implementations, [ 45 ] although the developers of the BSD union mounting facility found the non-recursive merging of directories in Plan 9 "too ...
If you've cleared the cache in your web browser, but are still experiencing issues, you may need to restore its original settings.This can remove adware, get rid of extensions you didn't install, and improve overall performance.
The restricted shell is a Unix shell that restricts some of the capabilities available to an interactive user session, or to a shell script, running within it.It is intended to provide an additional layer of security, but is insufficient to allow execution of entirely untrusted software.
BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...