2024年9月16日 · The Single UNIX Specification is the standard in which the core interfaces of a UNIX OS are measured. The UNIX standard includes a rich feature set, and its core volumes are simultaneously the IEEE Portable Operating System Interface (POSIX) standard and …

2009年11月23日 · POSIX is similar to the UNIX standard, and it is intended to ensure that software written for one POSIX-compliant operating system can run on other POSIX-compliant operating systems without modification. The POSIX standard defines a set of system calls, libraries, and utilities that are commonly found in UNIX-based operating systems.

2008年12月8日 · On Linux/OS X/Unix to display the groups to which you (or the optionally specified user) belong, use: id -Gn [user] which is equivalent to groups [user] utility which has been obsoleted on Unix. On OS X/Unix, the command id -p [user] is suggested for normal interactive. Explanation on the parameters:-G, --groups - print all group IDs

2011年1月17日 · Well, you can just sort the files first, and diff the sorted files. sort file1 > file1.sorted sort file2 > file2.sorted diff file1.sorted file2.sorted

In GNU/Linux, try to use ls, namei, getfacl, stat.. For Dir [flying@lempstacker ~]$ ls -ldh /tmp drwxrwxrwt. 23 root root 4.0K Nov 8 15:41 /tmp [flying@lempstacker ~]$ namei -l /tmp f: /tmp dr-xr-xr-x root root / drwxrwxrwt root root tmp [flying@lempstacker ~]$ getfacl /tmp getfacl: Removing leading '/' from absolute path names # file: tmp # owner: root # group: root # flags: --t user::rwx ...

2009年7月9日 · Standard Unix exit codes are defined by sysexits.h, as David mentioned. The same exit codes are used by portable libraries such as Poco - here is a list of them: Class Poco::Util::Application, ExitCode. A signal 11 is a SIGSEGV (segment violation) signal, which is different from a return code.

UNIX certification is a trusted and open system industry standard, ensuring that products conform to the most exacting criteria for portability, compatibility, and global interoperability. This enables buyers to specify UNIX conformance in procurements, facilitates Boundaryless Information Flow™, and enhances the perception of the UNIX system ...

Is there an easy way by which I can tell which type of Unix shell I am in? A command that shows whether I am in a Bash, C shell, KornShell (ksh), tcsh, or Z shell (zsh)? E.g., whatshellisthis

2014年9月15日 · ls -l --block-size=M will give you a long format listing (needed to actually see the file size) and round file sizes up to the nearest MiB.

Of course, this applies to bash or generally any popular Unix shell as well; though as @anishsane notes, Bash secretly optimizes bash -c 'command' by actually doing exec command. – tripleee Commented Jul 26, 2016 at 5:21