02-27-2018
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
$ echo |awk ' BEGIN {"date" | getline current_time;close("date");print "Report printed on " current_time}'
Report printed on Thu May 11 14:57:29 METDST 2006
This example works fine but how can i print all the output when is longer... (3 Replies)
Discussion started by: Klashxx
3 Replies
2. Shell Programming and Scripting
hello collegues,
I am attempting to use awk to search file1 (serverlist.csv) from each row with file2 (supported.txt). If the is no entry exists in serverlist then output to a file called notsupp.out if there is an entry output to supp.out
I can do this with basic shell scripting however... (0 Replies)
Discussion started by: chlawren
0 Replies
3. Shell Programming and Scripting
Hello,
Need some help here. I have this script (test.sh):
#!/bin/sh
var=$1
(( var = 2 * var ))
echo $var
Now I want to call this script from awk with one argument and then capture the result in a variable, something like:
echo 40 | awk ' { x = $1; "test.sh " x | getline y; print y }... (1 Reply)
Discussion started by: fbg
1 Replies
4. Shell Programming and Scripting
How do you make the getline function return to the original line?
The example below should make it clear where I am currently going wrong.
Thanks
AWK SCRIPT:
-------------
awk -F '-' '{
tmpLine = "EMPTY"
print "CURRENT LINE :"$0
getline tmpLine
print "NEXT LINE :"tmpLine
}'... (1 Reply)
Discussion started by: garethsays
1 Replies
5. Shell Programming and Scripting
I am using awk and want to use getline from a file like below
getline x < file
However file consists of two columns and I only want to store $2
Any way I can do this?
---------- Post updated at 06:54 AM ---------- Previous update was at 06:45 AM ----------
Done something like this.... (1 Reply)
Discussion started by: kristinu
1 Replies
6. Shell Programming and Scripting
Hi there, I have an ifconfig output and i want to write a script that determines whether there is a line "groupname ipmp" on a particular interface
here is my example ifconfig -a output
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1... (2 Replies)
Discussion started by: rethink
2 Replies
7. Shell Programming and Scripting
Greetings,
I have about 3000 files that I want to search. The first column in all of these 3000 files has a unique serial number on each line. The subsequent columns have lots of data.
I have another masterfile with three columns to help me find all the data I need in a moments notice:
col 1... (15 Replies)
Discussion started by: jeeplou
15 Replies
8. Shell Programming and Scripting
I want to import a textfile with getline into var t which has several lines. How do import all lines, since it only imports the last line:
while < ((getline t "textfile") > 0) (7 Replies)
Discussion started by: sdf
7 Replies
9. Shell Programming and Scripting
Hello,
I want to print out the DNA sequence entries (tens of thousand!) that are longer than certain value (i=200) from a file (FASTA file) as:
>S94D_ctg_8004 Average coverage: 402.95
ATAATGCCTGTGAATATGACATGTGTTCCTGTTTCTACATCAGACTACTATTCTTGCATA... (12 Replies)
Discussion started by: yifangt
12 Replies
10. Shell Programming and Scripting
Hi,
I have an awk script with the following function in it .
function cmd( c )
{
while( ( c | getline foo) > 0 ){
return foo ;
close( c );
}
}
c =... (4 Replies)
Discussion started by: MetaMan
4 Replies
LEARN ABOUT CENTOS
arping
ARPING(8) System Manager's Manual: iputils ARPING(8)
NAME
arping - send ARP REQUEST to a neighbour host
SYNOPSIS
arping [-AbDfhqUV] [-c count] [-w deadline] [-s source] -I interface destination
DESCRIPTION
Ping destination on device interface by ARP packets, using source address source.
OPTIONS
-A The same as -U, but ARP REPLY packets used instead of ARP REQUEST.
-b Send only MAC level broadcasts. Normally arping starts from sending broadcast, and switch to unicast after reply received.
-c count
Stop after sending count ARP REQUEST packets. With deadline option, arping waits for count ARP REPLY packets, until the timeout
expires.
-D Duplicate address detection mode (DAD). See RFC2131, 4.4.1. Returns 0, if DAD succeeded i.e. no replies are received
-f Finish after the first reply confirming that target is alive.
-I interface
Name of network device where to send ARP REQUEST packets.
-h Print help page and exit.
-q Quiet output. Nothing is displayed.
-s source
IP source address to use in ARP packets. If this option is absent, source address is:
o In DAD mode (with option -D) set to 0.0.0.0.
o In Unsolicited ARP mode (with options -U or -A) set to destination.
o Otherwise, it is calculated from routing tables.
-U Unsolicited ARP mode to update neighbours' ARP caches. No replies are expected.
-V Print version of the program and exit.
-w deadline
Specify a timeout, in seconds, before arping exits regardless of how many packets have been sent or received. In this case arping
does not stop after count packet are sent, it waits either for deadline expire or until count probes are answered.
SEE ALSO
ping(8), clockdiff(8), tracepath(8).
AUTHOR
arping was written by Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>. It is now maintained by YOSHIFUJI Hideaki <yoshfuji@skbuff.net>.
SECURITY
arping requires CAP_NET_RAW capability to be executed. It is not recommended to be used as set-uid root, because it allows user to modify
ARP caches of neighbour hosts.
AVAILABILITY
arping is part of iputils package and the latest versions are available in source form at http://www.skbuff.net/iputils/iputils-cur-
rent.tar.bz2.
iputils-121221 10 June 2014 ARPING(8)