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This is a list of POSIX (Portable Operating System Interface) commands as specified by IEEE Std 1003.1-2024, which is part of the Single UNIX Specification (SUS). These commands can be found on Unix operating systems and most Unix-like operating systems.
This parameter specifies a remote computer. If it is omitted, at schedules the commands and programs on the local computer. ID This parameter specifies the identification number assigned to a scheduled command. /delete This parameter cancels a scheduled command. If ID is omitted, all of the scheduled commands on the computer are canceled. /yes
Several shells can be started or be configured to start in a mode where only a limited set of commands and actions is available to the user. While not a security boundary (the command accessing a resource is blocked rather than the resource) this is nevertheless typically used to restrict users' actions before logging in.
In computing, a shell builtin is a command or a function, called from a shell, that is executed directly in the shell itself, instead of an external executable program which the shell would load and execute.
This is an accepted version of this page This is the latest accepted revision, reviewed on 29 December 2024. Family of Unix-like operating systems This article is about the family of operating systems. For the kernel, see Linux kernel. For other uses, see Linux (disambiguation). Operating system Linux Tux the penguin, the mascot of Linux Developer Community contributors, Linus Torvalds Written ...
The command has been implemented in operating systems such as Unix, DOS, IBM OS/2, [1] MetaComCo TRIPOS, [2] AmigaOS [3] (where if a bare path is given, cd is implied), Microsoft Windows, ReactOS, [4] and Linux. On MS-DOS, it is available in versions 2 and later. [5] DR DOS 6.0 also includes an implementation of the cd and chdir commands. [6]
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The system startup stage on embedded Linux system starts by executing the firmware / program on the on-chip boot ROM, which then load bootloader / operating system from the storage device like eMMC, eUFS, NAND flash, etc. [5] The sequences of system startup are varies by processors [5] but all include hardware initialization and system hardware ...