Is there any difference between a GUID and a UUID?
网页2008年10月29日 — The simple answer is: no difference, they are the same thing. For most practical purposes, treat them as 16 byte (128 bits) values that are used as a unique identifier. In Microsoft-speak they are called GUIDs, but call them UUIDs when not using Microsoft-speak. Even the authors of the UUID specification and Microsoft claim they are …
ruby - What is the difference between a Process' pid, ppid, uid, …
网页The UID, along with the GID and other access control criteria, is used to determine which system resources a user can access. The password file maps textual usernames to UIDs, but in the kernel, only UID's are used. EUID: The effective UID (euid) of a process is used for most access checks.
What do the identifiers PID, PPID, SID, PGID, UID, EUID mean?
网页2017年1月6日 — They're as follows. PID - Process ID. PPID - Parent Process ID. SID - Session ID. PGID - Process Group ID. UID - User ID. EUID - Effective User ID. Take a look at this SO Post and the first answer for a healthy explanation of what they're for. From the recommended page of definitions they posted.
What's the purpose of each of the different UIDs a process can have?
网页2008年10月15日 — The saved-uid is the effective-uid the process had when it started, and it's saved in order to be allowed as an argument to the various set*uid system calls. Note that a process with superuser privilege calling setuid(2) to change its effective uid will also have the real uid and saved uid changed to the same value, so the non-POSIX seteuid(2 ...
How to set uid and gid in Docker Compose? - Stack Overflow
网页2019年7月2日 — $ UID=xxx cmd is not a good idea for all the shells, as (e.g.) in bash UID is a read-only variable and already exists, but not exported. Comment by @ingyhere is really the way to go. Comment by @ingyhere is really the way to go.
What is a serialVersionUID and why should I use it?
网页2008年11月13日 — On comparison JVM will find both version UID are different and hence Deserialization will fail. Hence if serialVersionID for each class is defined by programmer itself. It will be same even if the class is evolved in future and hence JVM will always find that class is compatible with serialized object even though the class is changed.
unix - What are the well-known UIDs? - Stack Overflow
网页2009年6月18日 — The concept of "Well known UIDs" stems back to the early days of unix, before there were multitudes of distributions and unix variants. "Well known" UIDs were considered to be those for system users like adm, daemon, lp, sync, operator, news, mail etc, and were standard across all the various systems in order to avoid uid clashes.
How to create a GUID/UUID in Python - Stack Overflow
网页2022年8月6日 — This function is fully configurable and generates unique uid based on the format specified . eg:- [8, 4, 4, 4, 12] , this is the format mentioned and it will generate the following uuid . LxoYNyXe-7hbQ-caJt-DSdU-PDAht56cMEWi
linux - Difference between Real User ID, Effective User ID and …
网页When a file has the setuid bit on it, whenever an uid executes that file, that uid will temporary be replaced with the file owner's uid. So, if we have a file owned by uid 456 and has the setuid bit on it, whenever uid 123 executes that file, that file will be executed with the uid 456. In this scenario, uid 123 is the RUID and uid 456 is the EUID.
MiFare - Difference between UID and Serial Number of MiFare Card
网页This UID is often referred to as the Card Serial Number (CSN). The card serial number is not encrypted and any reader that is ISO compliant can read the card serial number. Edit 1: Mifare Card Serial Number is the unique identifier defined in ISO 14443-3A. There are 3 types of UID defined in the standard - single (4 bytes), double (7 bytes) and ...
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