hello
how can i cont number of char with loop coomand?
i dont want to use wc or other special command
the script should check all word's char. one by one
also a counter can handle the number
You should provide a more coherent problem statement which includes sample input and sample output. Also, explain what you mean by "special command" and why you do not want to use one. That information may prevent those offering a suggestion from wasting their time on undesirable approaches.
Regards,
Alister
---------- Post updated at 07:16 PM ---------- Previous update was at 07:13 PM ----------
Quote:
Originally Posted by wisecracker
Keep in mind that $(<file) is intended to be a more efficient but otherwise equivalent alternative to $(cat file). Since it's intended to be equivalent to a command substitution operation, all trailing newlines are stripped. This means that the count will be off by at least one (if not more) for any valid text file.
I havent done shell scripting in quite some time. I want to know how to count the number of characters in a word, specifically a parameter.
Example: myscript hello
I want "myscript" to return the number of charcaters in the parameter "hello".
Any ideas? (9 Replies)
I wish to compute the number of dot chars in a string.
Example:
VAR="aaaa.bbbbb.cccc"
I try the shortest command to solve this test.
Thanks in advance for your help.
Regards,
Giovanni (7 Replies)
Hi ..
I am having file say at 53rd position it will be as 0's or 1's .. How can i count the total number of 1's and 0's in the files at the 53 rd location.
Thanks,
Arun (5 Replies)
for example:
i hav a string like :
/rmsprd/arch01/rmsprd/rmsprdarch72736.log
how I can extract
my_num=72736?
I know I can
echo "/rmsprd/arch01/rmsprd/rmsprdarch72736.log" | tr "/" " " | awk '{ print $4 }' to get rmsprdarch72736.log (4 Replies)
I have a file with contents similar to this.
abcd
1234
4567
7666
jdjdjd
89289
9382
92
jksdj
9823
298
I want to write a shell script which count the number of lines that start with the number (disregard the lines starting with alphabets) (1 Reply)
To find out number of "|" symbol is available in file:
Input:
a|b|c|d|z
Ouput:
4
I am using below set of commands,It is working... Anybody have anyother solution using sed / awk.
cnt=`wc -c <1.txt`
cnt1=`tr -d "|" <1.txt >c.dat`
cnt2=`wc -c <c.dat`
outp=`expr $cnt... (19 Replies)
Hi
I am having a 'grep' headache
Here is the contents of my file:
(PBZ,CP,(((ME,PBZ,BtM),ON),((ME,((PBZ,DG),(CW9,PG11))),CW9,TS2,RT1)))
I would like to count out how many times 'PBZ' occurs and then place that number in the line above
3... (8 Replies)
Hi experts a have a very large file and I need to add two columns: the first one numbering the incidence of records and the another with the total count
The input file:
21 2341 A
21 2341 A
21 2341 A
21 2341 C
21 2341 C
21 2341 C
21 2341 C
21 4567 A
21 4567 A
21 4567 C
... (6 Replies)
Hello,
I have some problem in counting char of word, sum and change. I'm not sure shell script can do this.
Input data:
Sam1 BB BB AA AA BB BB BB
Sam2 BB BB AA AA AB AB AB
Sam3 BB BB BB AA BB BB BB
Sam4 AB AB AB AB AB AB AA
Sam5 BB BB AA AA BB BB -- If I count in column 2, B is 9... (3 Replies)
I need to write a BASH script that takes a 2 character string and removes the second character if it is not a digit e.g.
If the string is numberical value >9 e.g. string1 = '34' then leave string1 = '34'.
However if the string is <10 e.g. string1 = '3X' then remove the second char (which... (7 Replies)
Discussion started by: millsy5
7 Replies
LEARN ABOUT V7
sample
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)