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Top Forums Shell Programming and Scripting $((...)) and $[...] comparison Post 302381972 by proactiveaditya on Monday 21st of December 2009 03:31:38 PM
Old 12-21-2009
Code:
[root@pn]# a=3
[root@pn]# b=2
[root@pn]# echo $[a-b]
1
[root@pn]# echo $((a-b))
1

Are they equivalent with regards to Arithmetic evaluation?
 

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dsenableroot(8) 					    BSD System Manager's Manual 					   dsenableroot(8)

NAME
dsenableroot -- enables or disables the root account. SYNOPSIS
dsenableroot [-d] [-u username] [-p password] [-r rootPassword] DESCRIPTION
dsenableroot sets the password for the root account if enabling the root user account. Otherwise, if disable [-d] is chosen, the root account passwords are removed and the root user is disabled. A list of flags and their descriptions: -u username Username of a user that has administrative privileges on this computer. -p password Password to use in conjunction with the specified username. If this is not specified, you will be prompted for entry. -r rootPassword Password to be used for the root account. If this is not specified for enabling, you will be prompted for entry. EXAMPLES
-dsenableroot Your username will be used and you will be queried for both your password and the new root password to be set to enable the root account. -dsenableroot -d Your username will be used and you will be queried for only your password to disable the root account. -dsenableroot -u username -p userpassword -r rootpassword The supplied arguments will be used to enable the root account. -dsenableroot -d -u username -p userpassword The supplied arguments will be used to disable the root account. Mac OS August 08 2003 Mac OS
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