Conquering the Command Line: Unix and Linux Commands for by Mark Bates

By Mark Bates

Discover ways to grasp and triumph over the main necessary and invaluable command line instruments for Unix and Linux established platforms. during this booklet you'll find not just the main beneficial command line instruments you want to be aware of, but in addition the main invaluable thoughts and flags for these instruments. Conquering the Command Line isn’t only a rehash of the fellow web page for those instruments, yet quite a human-readable walk-through of those instruments to make you immediately extra effective on your day-by-day improvement existence.

NB: this can be a joint-KF8 dossier, with either 'old' MOBI and 'new' KF8/AZW3 in a single dossier, as published via the author.

Source: Publisher's web site. (

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424 this bit indicates that if the process terminates abnormally, it is to produce a core image on disk. It is set by functions that implement exec(). 4). 426–428 these bits are set and tested by various routines within the memory manager. They will not be considered any further here. 429 when this bit is set, the process does not generate any further I/O. As this is the province of the I/O manager, it will not be considered further in this book. 2), and is afterwards manipulated only by architecture-specific code.

10). 10 Process credentials and limits Line 368: uid, euid, suid, fsuid These are the user identifiers associated with the process. The operating system uses these IDs to determine whether or not to grant a process access to specific system resources. The real user ID (uid), that is the ID of the user that created the process, is in uid. The effective uid (euid) is in euid; effective IDs can be acquired temporarily. The saved uid is suid, and the uid used for file access is in fsuid. When a program is run, its effective uid is saved to its suid.

14 Line 387: thread There is really no fundamental distinction between the terms ‘task’, ‘process’, and ‘thread’ in Linux. However, the sources do seem to reserve the identifier ‘thread’ for architecturespecific details. , shows the thread_struct used with the i386 architecture. This contains all the state information that must be saved when a process is context switched out. Context switches always occur in kernel mode. Most of the hardware register values have already been saved on entry to the kernel.

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