I am new to this forum and a novice at shell script. I am trying to write a script to determine each of the NIC configured on a linux system and its speed and Duplex. I came up with the following piece of code:
But I am coming up with command not found for line in red. Why can't I declare a variable and increment just its count?
Last edited by pravin883; 01-17-2013 at 08:19 PM..
hi,
i want to increment a Variable but it doesnt work.
here my codé
COUNT=1
COUNT= 'expr $COUNT + 1'
i've tried it in the prompt but it print me:
expr: syntaxerror
What does I make wrong? (4 Replies)
Hi,
I want to write a perl script, which will increment number stored in file. I want to do this without any file handles. I think we have to use some UNIX commands. I am not sure how to do this with file handles.
Thanks, (1 Reply)
Hi All,
I have a variable n that stores a number.
Eg. echo $n comes out to be 120.
I need to print 121 using echo command on n.
Please advice.
Thanks in advance !! (4 Replies)
Hello There,
I have been trying to increment the value of variable to 1, 2, 3 etc. but, it displays
1
1+1
1+1+1
.....
:wall:
Could anyone help out with this?
for i in *.*
do
s=`expr $s+1`
echo $s
j=$i$j
mv $i $j
done
Any help is appreciated? (24 Replies)
i have a variable that has more than one value. i am declaring another variable, which will have the old variable data one by one. i want to use the second variable to hold the track of all the variable it has parsed from the first one. can somebody help me how do i declare and use the second... (7 Replies)
Hi there everyone!
This is my first post so be gentle.
I have a small bash script that is extracting 3 line every 3 lines. I got the AWK part but i cant do the loop part.
#!/bin/bash
export line=`awk 'END { print NR }' btnew`
echo $line
for i in {1..$line..3} #increment
do
echo... (2 Replies)
Hi All,
I have a file which has hundred of records with fixed number of fields. In each record there is set of 8 characters which represent the duration of that activity. I want to sum up the duration present in all the records for a report. The problem is the duration changes per record so I... (5 Replies)
Hi,
I am able to increment numbers but unable to increment the charters in unix -AIX.
Source : AAA BB CCC
Increment Number : 5
OUTPUT:
AAA BB CCC
AAA BB CCD
AAA BB CCE
AAA BB CCF
AAA BB CCG
Thanks
onesuri
Please use CODE tags as required by the forum rules. I have made a wild... (5 Replies)
hey guys,
I need to incerement the date variable for instance
echo `date '+%F %H:%M:00'`
this produces
2014-08-02 20:05:00
-I will grant this to : $Datehour and need to assign 1 hr from now to $Datelasthour
-the script time will be used to talk to DB system information.
however... (4 Replies)
Discussion started by: mo_VERTICASQL
4 Replies
LEARN ABOUT FREEBSD
vale
VALE(4) BSD Kernel Interfaces Manual VALE(4)NAME
vale -- a very fast Virtual Local Ethernet using the netmap API
SYNOPSIS
device netmap
DESCRIPTION
vale is a feature of the netmap(4) module that implements multiple Virtual switches that can be used to interconnect netmap clients, includ-
ing traffic sources and sinks, packet forwarders, userspace firewalls, and so on.
vale is implemented completely in software, and is extremely fast. On a modern machine it can move almost 20 Million packets per second
(Mpps) per core with small frames, and about 70 Gbit/s with 1500 byte frames.
OPERATION
vale dynamically creates switches and ports as clients connect to it using the netmap(4) API.
vale ports are named vale[bdg:][port] where vale is the prefix indicating a VALE switch rather than a standard interface, bdg indicates a
specific switch (the colon is a separator), and port indicates a port within the switch. Bridge and port names are arbitrary strings, the
only constraint being that the full name must fit within 16 characters.
See netmap(4) for details on the API.
LIMITS
vale currently supports up to 4 switches, 16 ports per switch, with 1024 buffers per port. These hard limits will be changed to sysctl vari-
ables in future releases.
SYSCTL VARIABLES
vale uses the following sysctl variables to control operation:
dev.netmap.bridge The maximum number of packets processed internally in each iteration. Defaults to 1024, use lower values to trade
latency with throughput.
dev.netmap.verbose Set to non-zero values to enable in-kernel diagnostics.
EXAMPLES
Create one switch, with a traffic generator connected to one port, and a netmap-enabled tcpdump instance on another port:
tcpdump -ni vale-a:1 &
pkt-gen -i vale-a:0 -f tx &
Create two switches, each connected to two qemu machines on different ports.
qemu -net nic -net netmap,ifname=vale-1:a ... &
qemu -net nic -net netmap,ifname=vale-1:b ... &
qemu -net nic -net netmap,ifname=vale-2:c ... &
qemu -net nic -net netmap,ifname=vale-2:d ... &
SEE ALSO netmap(4)
http://info.iet.unipi.it/~luigi/vale/
Luigi Rizzo, Giuseppe Lettieri: VALE, a switched ethernet for virtual machines, June 2012, http://info.iet.unipi.it/~luigi/vale/
AUTHORS
The vale switch was designed and implemented in 2012 by Luigi Rizzo and Giuseppe Lettieri at the Universita` di Pisa.
vale was funded by the European Commission within FP7 Projects CHANGE (257422) and OPENLAB (287581).
BSD July 27, 2012 BSD