Pattern search (regular expression in UNIX) Post: 302864327

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Regular Expression to exclude pattern

Hi All I am using regular expressions to determine how to group certain data. I've included an example of the data below. USD_SPTR_2Y_725.5_PUT_EUROPEAN_09Q1|USD||European| CAD_NDX_10Yx1Y_5.5_PUT_EUROPEAN_09Q1|CAD||European| The regular expressions I am using is as follows and this is...

2. Shell Programming and Scripting

Perl Regular Expression Word Search

I'm trying to have my perl script telnet into the network device execute a command then dump the output of the command into a variable. The script then greps for the word "STANDBY". I can't seem to get the script to print out the output because it seems that the script can't find the word...

3. Shell Programming and Scripting

awk + pattern search with regular expression

Hi , I have a file with "|" (pipe) as a delimeter. I am looking for the record count where 5th field is a number with 15 digit length only. all the records with above requirement is valid rest all are invalid. I need count of valid records and invalid records. Can anyone please help

4. Shell Programming and Scripting

validate date pattern using Regular Expression

Hi, i am java guy and new to unix. I want to validate date pattern using Regex expression here is the sample program i have written. #!/bin/sh checkDate="2010-04-09" regex="\\d{4}-\\d{2}-\\d{2}\$" echo $regex if ] then echo "OK" else echo "not OK" fi But the ouput is...

5. Shell Programming and Scripting

Validate time pattern using regular expression

Hi, I am new to scripting. please help me in validating the user entered time Pattern Here is the program #!/bin/bash validateTimeFormat() { checkTime=$1 timePattern="::" if ] then echo "Valid time pattern" return 1 else echo "InValid time pattern" return -1 fi } echo "Please...

6. Shell Programming and Scripting

Regular Expression for Random pattern

What would be the regular expression that can search for a Pattern, having 8 characters out of which atleast 1 digit, 1 lower case, 1 upper case letter and 1 special character must be there. But these can occur at any place randomly. Please help me out. I'm using find $dir -name "*.txt" -exec...

7. Shell Programming and Scripting

How can awk search a string without using regular expression?

Hello, Awk seem treat the pattern as regular expression, how can awk search not using regular expression? e.g. just represent for "", not "A" or "a" . I don't want to add backslash .

8. Programming

Perl: How to read from a file, do regular expression and then replace the found regular expression

Hi all, How am I read a file, find the match regular expression and overwrite to the same files. open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat"; open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat"; while (<DESTINATION_FILE>) { # print...

9. Shell Programming and Scripting

awk regular expression search

Hi All, I would like to search a regular expression by passing as an i/p variableto AWK. For Example :: 162.111.101.209.9516 162.111.101.209.41891 162.111.101.209.9516 162.111.101.209.9517 162.111.101.209.41918 162.111.101.209.9517 162.111.101.209.41937 162.111.101.209.41951...

10. Shell Programming and Scripting

Regular Expression repeat pattern

Hi, I'm struggling with very very simple task but dont know where I'm going wrong. Have the following file numbers.txt 1 12 123 1234 12345 123456 1234567 12345678 123456789 1234567890 9876543210 987654321 98765432 9876543 987654 98765

LEARN ABOUT DEBIAN

nat

NAT action in tc(8)                                                    Linux                                                   NAT action in tc(8)

NAME

       nat - stateless native address translation action

SYNOPSIS

       tc ... action nat DIRECTION OLD NEW

       DIRECTION := { ingress | egress }

       OLD := IPV4_ADDR_SPEC

       NEW := IPV4_ADDR_SPEC

       IPV4_ADDR_SPEC := { default | any | all | in_addr[/{prefix|netmask}]

DESCRIPTION

       The  nat  action allows to perform NAT without the overhead of conntrack, which is desirable if the number of flows or addresses to perform
       NAT on is large. This action is best used in combination with the u32 filter to allow for efficient lookups of a large number of  stateless
       NAT rules in constant time.

OPTIONS

       ingress
              Translate destination addresses, i.e. perform DNAT.

       egress Translate source addresses, i.e. perform SNAT.

       OLD    Specifies addresses which should be translated.

       NEW    Specifies addresses which OLD should be translated into.

NOTES

       The  accepted address format in OLD and NEW is quite flexible. It may either consist of one of the keywords default, any or all, represent-
       ing the all-zero IP address or a combination of IP address and netmask or prefix length separated by a slash (/) sign.  In  any  case,  the
       mask (or prefix length) value of OLD is used for NEW as well so that a one-to-one mapping of addresses is assured.

       Address  translation  is  done  using  a  combination  of binary operations. First, the original (source or destination) address is matched
       against the value of OLD.  If the original address fits, the new address is created by taking the leading bits from  NEW  (defined  by  the
       netmask of OLD) and taking the remaining bits from the original address.

       There  is  rudimental  support for upper layer protocols, namely TCP, UDP and ICMP.  While for the first two only checksum recalculation is
       performed, the action also takes care of embedded IP headers in ICMP packets by translating the respective address therein, too.

SEE ALSO

       tc(8)

iproute2                                                            12 Jan 2015                                                NAT action in tc(8)