Aug 27, 2014 · The POSIX specification for find says:-mtimen The primary shall evaluate as true if the file modification time subtracted from the initialization time, divided by 86400 (with any remainder discarded), is n.

Sep 16, 2024 · 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 …

Sep 14, 2012 · In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance, ./myprogram &; echo $! will return the PID of the process which backgrounded myprog...

Sep 10, 2011 · When you try to execute a program in unix (one with the executable bit set), the operating system will look at the first few bytes of the file. These form the so-called "magic number", which can be used to decide the format of the program and how to execute it. #! corresponds to the magic number 0x2321 (look it up in an ascii table).

unix bash shell script equal comparison operator is not comparing. 1. Equal and not equal operators not ...

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 ...

Nov 11, 2014 · unix; if-statement; Share. Improve this question. Follow edited Nov 11, 2014 at 11:31. fedorqui . 291k 109 ...

I have a script which uses test command to check if $? (return code of last executed command) is not equal to zero.

Nov 23, 2009 · 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.

The following is a decent solution across Unix/Linux installations, that does not rely on any unusual program features. This supports a multi-line message body, multiple attachments, and all the other typical features of mailx. Unfortunately, it does not fit on a single line.