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Top Forums UNIX for Beginners Questions & Answers Big difference between UNIX systems? Which one as OSX replacement for a developer? Post 303010374 by vbe on Saturday 30th of December 2017 12:58:26 PM
Old 12-30-2017
You dont say much about your true needs... and software developper is quite vague: what kind? using what language(s) ?
Most commands ( user or man (1)) are the same on all, but syntax can vary...
None have a true backup facility except AIX and HP-UX but I may be wrong there as long time since last time I looked out...
cron implementation can change in linux world...
all share the same directory structure ( / being the root...) but again can vary if you are Unix V... compliant meaning you use /opt and pending /var/opt etc...
The default FS can vary too and you have quite some choice...

What fo you intend to use as a platform?
RAM?
CPUS?
Disks?

mx 2 cents.
 

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true(1) 						      General Commands Manual							   true(1)

NAME
true, false - Returns a standard exit value SYNOPSIS
true false STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: true: XCU5.0 false: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. DESCRIPTION
The true command returns a 0 (zero) exit value. The false command returns a nonzero exit value. These commands are usually used in input to shell commands. NOTES
The special built-in utility : (colon) is sometimes more efficient than the true command. EXIT STATUS
[Tru64 UNIX] The nonzero value returned by the false command may vary from system to system. EXAMPLES
To construct a loop in a shell procedure, enter: while true do date sleep 60 done This procedure displays the date and time once a minute. To stop it, press the Interrupt key sequence. SEE ALSO
Commands: csh(1), ksh(1), Bourne Shell sh(1b), POSIX shell sh(1p) Standards: standards(5) true(1)
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