Sponsored Content
Top Forums Shell Programming and Scripting Advice using cut & echo combination commands Post 302440564 by pravin27 on Tuesday 27th of July 2010 02:29:54 PM
Old 07-27-2010
Hi,

Post your sample input file and expected output.
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Combination Of commands

Hello All, I just wanted to know what are the different ways of using commands in combination. The most common one which i know is using pipes. Also grouping is also done like ( ls; date) where output of both the commands is displayed. Are there any other ways of combining various... (2 Replies)
Discussion started by: rahulrathod
2 Replies

2. UNIX for Dummies Questions & Answers

combination of two commands

I want to show a output like this Lee Ballancore PID TTY TIME CMD 31799 pts/3 00:00:00 vim 31866 pts/3 00:00:00 vim 2495 pts/7 00:00:00 vim 8368 pts/0 00:00:00 vim 9544 pts/2 00:00:00 ps Alistairr Rutherford PID TTY TIME CMD 8368 pts/0 00:00:00 vim 9544 pts/2 00:00:00 ps ... (3 Replies)
Discussion started by: nehaquick
3 Replies

3. UNIX for Dummies Questions & Answers

Combination of find -xargs & wc -l

Dear all, I have to calculate sum of record count of files of the specified directory. First I tried the following way which prints one or more outputs. How can I sum of this output? find /home/work/tmp/1/O/ -type f -print0 | xargs -0 wc -l | grep total 1666288 total 1073908 total ... (4 Replies)
Discussion started by: mr_bold
4 Replies

4. Shell Programming and Scripting

Sed Awk Cut Grep Combination Help ?

I have been reading for a few hours trying to educate myself enough to accomplish this task, so please know I have performed some research. Unfortunately, I am not a *NIX scripting expert, or a coder. I come from a network background instead. SO, here is my desired outcome. I have some Cisco... (5 Replies)
Discussion started by: abbzer0
5 Replies

5. Shell Programming and Scripting

storing output from echo & cut into variable

Hi All, Hope someone can advise here as I have been struggling to find a syntax that works here. I have tried a stack of combination I have seed in the forums but I think because I have needed to use "" and `` in the statments another method is found. I am reading in lines with the following... (1 Reply)
Discussion started by: nkwilliams
1 Replies

6. Shell Programming and Scripting

Append && echo "success" to all commands

I am learning to build from SVN and other tools, with a lot of copying and pasting from forums. I like to append && echo "success" to all commands so that I can see at a glance if things went all right. Is there a way that I can have the bash shell append this to all commands? Thanks! (5 Replies)
Discussion started by: dotancohen
5 Replies

7. Shell Programming and Scripting

combination between || and && in IF condition with ksh

Dear All, Please advice about this issue. when i run this line in a script if && || && || && if i enter $x = test3 and $y = test1 the If condition apply while it should not Best Regards (2 Replies)
Discussion started by: islam.said
2 Replies

8. Shell Programming and Scripting

Using a combination of sort/cut/grep/awk/join/paste/sed

I have a file and need to only select users that have a shell of “/bin/bash” in the line using awk or sed please help (4 Replies)
Discussion started by: boyboy1212
4 Replies

9. Shell Programming and Scripting

Optimize a combination of commands

Im currently running this command to satisfy a particular task. it works for my purposes. but i want to be able to optimize this string of commands and have it be reduced to 1 or 2 commands, if at all possible: head -4 datafile 2>/dev/null | cut -c1-400 | wc | awk '{print $2$1$3}' (5 Replies)
Discussion started by: SkySmart
5 Replies
Packet sample action in tc(8)                                          Linux                                         Packet sample action in tc(8)

NAME
sample - packet sampling tc action SYNOPSIS
tc ... action sample rate RATE group GROUP [ trunc SIZE ] [ index INDEX ] tc ... action sample index INDEX DESCRIPTION
The sample action allows sampling packets matching classifier. The packets are chosen randomly according to the rate parameter, and are sampled using the psample generic netlink channel. The user can also specify packet truncation to save user-kernel traffic. Each sample includes some informative metadata about the original packet, which is sent using netlink attributes, alongside the original packet data. The user can either specify the sample action parameters as presented in the first form above, or use an existing sample action using its index, as presented in the second form. SAMPLED PACKETS METADATA FIELDS
The metadata are delivered to userspace applications using the psample generic netlink channel, where each sample includes the following netlink attributes: PSAMPLE_ATTR_IIFINDEX The input interface index of the packet, if there is one. PSAMPLE_ATTR_OIFINDEX The output interface index of the packet. This field is not relevant on ingress sampling PSAMPLE_ATTR_ORIGSIZE The size of the original packet (before truncation) PSAMPLE_ATTR_SAMPLE_GROUP The psample group the packet was sent to PSAMPLE_ATTR_GROUP_SEQ A sequence number of the sampled packet. This number is incremented with each sampled packet of the current psample group PSAMPLE_ATTR_SAMPLE_RATE The rate the packet was sampled with OPTIONS
rate RATE The packet sample rate. RATE is the expected ratio between observed packets and sampled packets. For example, RATE of 100 will lead to an average of one sampled packet out of every 100 observed. trunc SIZE Upon set, defines the maximum size of the sampled packets, and causes truncation if needed group GROUP The psample group the packet will be sent to. The psample module defines the concept of groups, which allows the user to match spe- cific sampled packets in the case of multiple sampling rules, thus identify only the packets that came from a specific rule. index INDEX Is a unique ID for an action. When creating new action instance, this parameter allows to set the new action index. When using existing action, this parameter allows to specify the existing action index. The index must 32bit unsigned integer greater than zero. EXAMPLES
Sample one of every 100 packets flowing into interface eth0 to psample group 12: tc qdisc add dev eth0 handle ffff: ingress tc filter add dev eth0 parent ffff: matchall action sample rate 100 group 12 index 19 Use the same action instance to sample eth1 too: tc qdisc add dev eth1 handle ffff: ingress tc filter add dev eth1 parent ffff: matchall action sample index 19 SEE ALSO
tc(8), tc-matchall(8) psample(1) iproute2 31 Jan 2017 Packet sample action in tc(8)
All times are GMT -4. The time now is 02:45 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy