I have been trying to disable the firewall on a new install of RH8(Psyche). It will NOT stay disabled. I've gone thru system tools, security level and disabled it, and it says YES, like it will save my settings, but when i open it up again, it is always back to HIGH. I also tried using the... (3 Replies)
I am using digital Unix and lpd. I have HP 4200n LaserJet TCP printer, but when I use lpr command, it always print duplex.
I can turn off duplex feature at the panel of the printer, but then other Windows computer cannot print duplex. How can I set up /etc/printcap file so that it will be... (2 Replies)
Ok, so we get reports from operations after they do walk throughs about servers with amber or red lights showing. They want us to resolve the issues. On Solaris I can run prtdiag to identify the amber lights and clear them (replace hardware or "reboot" the daemon).
How do I remotely figure out... (1 Reply)
#!/bin/sh
cd /u02/app/ccalloc/dev/in
CURDIR=`pwd`
echo directory listing of $CURDIR
echo
ls -latr
i have a basic shell script that displays a specific files on a directory. when the script is run and it does not find the file in the directory it display a first line message of
how... (3 Replies)
After searching the forum, I found that Bash spawns a subshell when using the pipe. I am wondering if there is an option or any other way to turn off this fuctionality.
We are pulling over some scripts from a Korn shell environment. I have found ways to work around looping from a pipe (Thanks... (4 Replies)
Hi all,
In my program, I am trying to use ioctl to turn on/off the wireless card, using SIOCSIFFLAGS (I am new to it but somebody said it is the most traditional way). However, it seems that I didn't set the flag correctly since the wireless is always on (I have root permission). If any one... (2 Replies)
Hi All
i am cat'ing a file and then using cut to get rid of some info, is there a way to turn the list into one line
i.e
1
2
3
4
5
into
1 2 3 4 5 (4 Replies)
I'm running a Linux OS that uses Debian as it's base. A commercial vpn is installed that uses OpenVPN. For some reason, I can't get ipv6 to tunnel properly .... and Ipleak.net shows that my location is being unmasked by ipv6.
I've tried kernel commands at boot, I've tried sysctl.conf commands.... (2 Replies)
Discussion started by: benc
2 Replies
LEARN ABOUT NETBSD
flock
FLOCK(1) BSD General Commands Manual FLOCK(1)NAME
flock -- Provide locking API for shell scripts
SYNOPSIS
flock [-dnosvx] [-w timeout] lockfile|lockdir [-c command] | [command ...]
flock [-dnsuvx] [-w timeout] lockfd
DESCRIPTION
The flock utility provides flock(2) access to the command line or scripts. The first form locks a file or directory while the command pro-
vided is executed. If the file or directory does not exist, then a file is created.
The second form can use an arbitrary file descriptor that is provided from a shell script for example:
(
flock -s 100
# commands to be executed under the lock
) 100> /path/to/lockfile
The following options are available:
-c command Pass a command to a the shell.
-d, --debug Provide debugging output.
-n, --nb, --nonblock
Don't block and fail immediately if the lock could not be obtained.
-o, --close Close the file before executing the command. This is useful if the child forks and should not be holding the lock.
-s, --shared Obtain a shared lock.
-u, --unlock Unlock an existing lock. This is available only for a file descriptor.
-v, --verbose On error print an explanation of the failure.
-w, --wait, --timeout seconds
Fail if the lock could not be obtained after seconds.
-x, --exclusive Obtain an exclusive lock.
EXIT STATUS
The flock utility exits 0 on success, and >0 if an error occurs.
SEE ALSO shlock(1), flock(2)HISTORY
An flock utility appeared in NetBSD 6.1.
BSD November 2, 2012 BSD