I am looking for some advice on wether to use unix or red hat linux? I have played with most windows OS and Mac OS up to in and including OS X. any and all advice would be appreciated (4 Replies)
I have a while read loop cycling through a fixed-length csv file and I'd like to use an if statement to check two fields in each line. I'm basically asking for your suggestions on the best and easiest way to check two fields in each line. I'm sure many of you may be thinking just use awk, but if... (1 Reply)
Hi.
First of all, Im an msoft guy, and when it comes to linux/unix, I'm retarded.
Here is what I'm trying to do.
I want to
start
I want to automatically connect to a remote server.
Then I need it to login(https)
-insert the licensce in the box(vi)
-based on that licensce, the... (1 Reply)
Ok. I want to parse a log file and search only for denied traffic for the previous hour. The log looks like this:
Jun 18 17:47:56 routername 36806: Jun 18 17:53:01.088: %SEC-6-IPACCESSLOG: list ingress-filter denied tcp 1.2.3.4(1234) -> 6.7.8.9(53), 4 packets
I only really care about the... (12 Replies)
Alright, I feel like I have a pretty good basic knowledge of shell scripting, but this one is throwing me for a loop. I know I've seen something similar done with awk, but I couldn't find it with the search function.
I've grepped through my log file and get results like this:
--... (14 Replies)
i am currently running windows vista home premium, i want to install unix because i just started a computer programing course, i am just wondering if i install unix will i still have vista?? how does it work? will i get a choice of which os to run on system startup?? (1 Reply)
Hi everyone. I must admit up front that I am not very strong when it comes to Linux. I am actually a Windows guy, but don't let that count against me. :) I work for a very small company so we do not have a Server/Linux Admin on staff. Most of our needs have been handled by our WebHost. We have... (2 Replies)
Hi folks,
I use following script:-
#!/bin/sh
# cd Linbread
TODAY=`date +"%m%d"`
DATA=`grep $TODAY linbread.dat`
HOUR=`date +"%H"`
if
then TOD="Morning"
elif
then TOD="Afternoon"
else
TOD="Evening"
fi
echo $DATA | gawk -F"|" '{printf("%s\n\n%s",$2,$3)}' > $$tmp
fold -s -w60... (0 Replies)
Guys,
Can you tell me what value would additional knowledge of PERL and CGI scripting will add to my skill set of UNIX shell scripting and ORACLE PL/SQL?
I understand that PERL is a good tool for text processing. (1 Reply)
Discussion started by: yabhi_22
1 Replies
LEARN ABOUT FREEBSD
vop_advise
VOP_ADVISE(9) BSD Kernel Developer's Manual VOP_ADVISE(9)NAME
VOP_ADVISE -- apply advice about use of file data
SYNOPSIS
#include <sys/param.h>
#include <sys/vnode.h>
int
VOP_ADVISE(struct vnode *vp, off_t start, off_t end, int advice);
DESCRIPTION
This call applies advice for a range of a file's data. It is used to implement the posix_fadvise system call.
Its arguments are:
vp The vnode of the file.
start The start of the range of file data.
end The end of the range of file data.
advice The type of operation to apply to the file data. Possible values are:
POSIX_FADV_WILLNEED Initiate an asynchronous read of the file data if it is not already resident.
POSIX_FADV_DONTNEED Decrease the in-memory priority of clean file data or discard clean file data.
If the start and end offsets are both zero, then the operation should be applied to the entire file. Note that this call is advisory only
and may perform the requested operation on a subset of the requested range (including not performing it at all) and still return success.
LOCKS
The file should be unlocked on entry.
RETURN VALUES
Zero is returned if the call is successful, otherwise an appropriate error code is returned.
ERRORS
[EINVAL] An invalid value was given for advice.
SEE ALSO vnode(9)BSD October 3, 2013 BSD