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What does a leading colon (:) mean in a script? Bash and sh both use colons (":") in more than one context. You'll see it used as a separator ($PATH, for example), as a modifier (${n:="foo"}) and as a null operator ("while :").


Title Date Comments
Why does fsck need a scratch file?   2011 04  2011/06/02 KenPorter
- Although fsck hasn't needed scratch files for a while, large disks are reopening that need. -
Finding Yesterday's Date   2011 04  2012/09/11 TonyLawrence
- How to find yesterday's date on Linux, Mac and any other Unix. -
Unix and Linux startup scripts, Part 1   2009 12 
- In the beginning, there was "init". If you had a Unix system, you had "init" and it was almost certainly process id 1. -
Unix and Linux startup scripts, Part 2   2009 12  2009/12/11 TonyLawrence
- The rc.d system is used on NetBSD, FreeBSD and DragonFly (andpossibly a few other systems) to launch daemon processes when the system goes multiuser. -
Unix and Linux startup scripts, Part 3   2009 12 
- We have looked at both System V and BSD methods; until fairly recently that would hav e been the end of the discussion. -
What does a leading colon (:) mean in a script?   2010 03 
- Bash and sh both use colons (":") in more than one context. You'll see it used as a separator ($PATH, for example), as a modifier (${n:="foo"}) and as a null operator ("while :"). -
PC-BSD   2006 05 
- A new BSD ?: I do like BSD OSEs, but I think the best thing about the release of PC-BSD is that the download page incudes a VMware image. That's smart, and I wish more distro's would do this. -
Mach   2004 08 
- Mach is a microkernel system, which means that most of the features that are ordinarily within the kernel are instead separate servers - think of them as daemons, though they aren't necessarily running in user space. -
pkill   2004 04 
- One some OSes, this is a 'parallel kill' that will use rsh to kill processes on multiple machines. On Linux and BSD, it allows selection by various criteria, including names (like 'killall'). -
ncftp - a better ftp client   2003 12 
- The advantages of ncftp include automatic resumption of failed downloads and ease of working through firewalls. -
bsd   2003 10 
- Berkely Software Distribution. A Unix fork from 1977, BSD was the origination of much that it is important and expected in any Unix system. Many BSD programs and features have been incorporated into SysV Unix and of course vice versa, but one major difference has always been SysV's use of inittab, which BSD does not use. -
A BSD-based machine can't connect to mine via UUCP   1997-2003 
- A BSD-based machine can't connect to mine via UUCP -
 
 
Kerio Connect Mailserver
 
 
linux vs. bsd   1997-2004 
- linux vs. bsd - it's not the steak, it's the sizzle: I don't disagree with anything you said. I will make two comments, though. First, the "ps" issue is more complicated than it first appears. Secondly (and in spite of the first comment), you are absolutely correct that Linux changes too damn much, ignores legacy considerations and is well on the path to perdition by making things much more complex than they need to be. -
Early opinions of Linux vs. BSD   1997-2004 
- If you want to go back to your "Golden Unix Years" [ or more likely the Xenix years ] I'd suggest the FreeBSD distribution. -
How do I determine my IP address in a shell script?   1997-2004 
- Obtaining client IP address is not always direct or easy. You may have to dig it out of shell command output. -
 
 
Kerio Control Firewall
 
 
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