For the command below, I need to understand what exactly the command does and provide an examples for which the output will be saved to file save2... From my understanding, if the file provides an error in the first half of the pipe, it'll save to save1 and will never give an error to save to save2. I'm just confused as to what exactly would cause it to save anything to save2.
2. Relevant commands, code, scripts, algorithms:
Code:
cat 2>save1 0<memo | sort 2>save2 1>letter
Any help with this or if anyone can provide a tutorial that goes into examples using a combination of cat, pipes and file descriptors I would really appreciate it!
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number:
Texas State University, San Marcos, TX, USA, Professor Quijun Gu, CS 4350
Moderator's Comments:
please use next time the full template, even if you believe to not enter in the orthodox form try your best, and dont forget to use for all code and data code tags , thanks
Can any body tell me when I put close(2), why the code does not show any out put?
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
int main(){
int fd1,fd2,fd3,fd4;
close(2);
fd1=open("test1.txt",O_WRONLY |O_CREAT | O_TRUNC,0744);
fprintf(stderr,"fd1 = %d\n",fd1);
... (5 Replies)
Hello All,
Im opening a file desciptor in perl and sending data using print CMD "$xyz".
is there a limit to the length of the string that I can give to this CMD at a time. (3 Replies)
Hello Friends,
I have a question, i am trying to write a shell script in the bash shell.
#!/bin/sh
NAWK=/bin/nawk
AWK=/bin/awk
FIX_XML_PATH=/home/administrator/testfix/fix/
Y=`ls $FIX_XML_PATH | grep xml`
echo $Y
cat $Y
in this case when i do the echo $Y command it gives me the... (11 Replies)
Hello,
I am trying to send text to a USB to serial adaptor and then to an external speech synthesizer. I tried using the cat and echo commands with no luck. I have gotten some audio output from my synthesizer using Kermit a terminal emulator, so I am pretty sure my synthesizer and my USB to serial... (1 Reply)
I am having problems getting a list of filenames that I want from a directory.
example: I have 3 files - filename.xxx.20110505.123030
filename.yyy.20110505.123030
filename.zzz.20110505.123030
There may be multiple xxx,... (3 Replies)
Can any one guide me how can i accomplish this by script
i continuously receive files via our ftp server into a certain folder is there a way i can take those files cat it to a new file by hour and create a new file when new hour starts? (4 Replies)
Can we concatenate say,
I have a few files prefixing with 2009...
So now i want all the 2009 files into one single file..
Can this be achieved???? (4 Replies)
hello! why this works?
cd /home/user
cat * | ecasound -i stdin -o jack
and this doesn't?
cd /home/user/somedirectory
cat * | ecasound -i stdin -o jack
somedirectory are full with exe files which are the best source for this sort of noise thing (10 Replies)
Discussion started by: karlhungus
10 Replies
LEARN ABOUT DEBIAN
mrtg-mibhelp
MRTG-MIBHELP(1) mrtg MRTG-MIBHELP(1)NAME
mrtg-mibhelp - A Table of some interesting OIDs
OVERVIEW
This File Contains a collection of interesting MIB Entries ... mrtg knows about their names ... depending on the ASN.1 Syntax you may have
to put gauge into the Options[]: parameter.
For information about how to create a Target[]: parameter which references these MIB entries, please consult mrtg-reference.
MIB LIST
ifOperStatus
Descriptor: ifOperStatus
Identifier: 1.3.6.1.2.1.2.2.1.8
ASN.1 Syntax: INTEGER
Enumeration: up 1, down 2, testing 3
The current operational state of the interface. The testing(3) state indicates that no operational packets can be passed.
ifAdminStatus
Descriptor: ifAdminStatus
Identifier: 1.3.6.1.2.1.2.2.1.7
ASN.1 Syntax: INTEGER
Enumeration: up 1, down 2, testing 3
The current administrative state of the interface. The testing(3) state indicates that no operational packets can be passed.
ifInOctets
Descriptor: ifInOctets
Identifier: 1.3.6.1.2.1.2.2.1.10
ASN.1 Syntax: Counter32
The total number of octets received on the interface, including framing characters.
ifInUcastPkts
Descriptor: ifInUcastPkts
Identifier: 1.3.6.1.2.1.2.2.1.11
ASN.1 Syntax: Counter32
The number of subnetwork-unicast packets delivered to a higher-layer protocol.
ifInNUcastPkts
Descriptor: ifInNUcastPkts
Identifier: 1.3.6.1.2.1.2.2.1.12
ASN.1 Syntax: Counter32
The number of non-unicast (i.e., subnetwork- broadcast or subnetwork-multicast) packets delivered to a higher-layer protocol.
ifInDiscards
Descriptor: ifInDiscards
Identifier: 1.3.6.1.2.1.2.2.1.13
ASN.1 Syntax: Counter32
The number of inbound packets which were chosen to be discarded even though no errors had been detected to prevent their being deliverable
to a higher-layer protocol. One possible reason for discarding such a packet could be to free up buffer space.
ifInErrors
Descriptor: ifInErrors
Identifier: 1.3.6.1.2.1.2.2.1.14
ASN.1 Syntax: Counter32
The number of inbound packets that contained errors preventing them from being deliverable to a higher-layer protocol.
ifInUnknownProtos
Descriptor: ifInUnknownProtos
Identifier: 1.3.6.1.2.1.2.2.1.15
ASN.1 Syntax: Counter32
The number of packets received via the interface which were discarded because of an unknown or unsupported protocol.
ifOutOctets
Descriptor: ifOutOctets
Identifier: 1.3.6.1.2.1.2.2.1.16
ASN.1 Syntax: Counter32
The total number of octets transmitted out of the interface, including framing characters.
ifOutUcastPkts
Descriptor: ifOutUcastPkts
Identifier: 1.3.6.1.2.1.2.2.1.17
ASN.1 Syntax: Counter32
The total number of packets that higher-level protocols requested be transmitted to a subnetwork-unicast address, including those that were
discarded or not sent.
ifOutNUcastPkts
Descriptor: ifOutNUcastPkts
Identifier: 1.3.6.1.2.1.2.2.1.18
ASN.1 Syntax: Counter32
The total number of packets that higher-level protocols requested be transmitted to a non- unicast (i.e., a subnetwork-broadcast or
subnetwork-multicast) address, including those that were discarded or not sent.
ifOutDiscards
Descriptor: ifOutDiscards
Identifier: 1.3.6.1.2.1.2.2.1.19
ASN.1 Syntax: Counter32
The number of outbound packets which were chosen to be discarded even though no errors had been detected to prevent their being
transmitted. One possible reason for discarding such a packet could be to free up buffer space.
ifOutErrors
Descriptor: ifOutErrors
Identifier: 1.3.6.1.2.1.2.2.1.20
ASN.1 Syntax: Counter32
The number of outbound packets that could not be transmitted because of errors.
ifOutQLen
Descriptor: ifOutQLen
Identifier: 1.3.6.1.2.1.2.2.1.21
ASN.1 Syntax: Unsigned32
The length of the output packet queue (in packets).
frInOctets
From: Simon Ferrett <simonf@world.net>
'frInOctets' => '1.3.6.1.2.1.10.32.2.1.9'
'frOutOctets' => '1.3.6.1.2.1.10.32.2.1.7'
which when used in the form:
frInOctets.pp.dd&frOutOctets.pp.dd:community@cisco.router
where pp is the physical port that the frame relay pvc is defined on and dd is the DLCI of the pvc gets you the in and out octets for just
that pvc.
ifAdminHack and ifOperHack
The return values of ifAdminStatus and ifOperStatus are not very useful for graphing. Use ifOperHack and ifAdminHack instead. They return 1
for UP and 0 otherwise.
Note these are not real MIB entities but mrtg hacks
PseudoZero and PseudoOne
will return 0 and 1 respectively
Note these are not real MIB entities but mrtg hacks
AUTHOR
Tobias Oetiker <tobi@oetiker.ch>
2.17.4 2012-01-12 MRTG-MIBHELP(1)
03-06-2017
