sed - replacing on the right of a pattern and looking for exact word?
how would you get SED to do the following, say you have the following lines in a text file:
user=tigger
some text some text
some text some text
some text some text
user=ted
some text some text
some text some text
some text some text
user=thekingofrockandroll
you want to find any line which has 'user=[the user name]' and replace it with 'user=xxx'
so the string after the 'user=' will always contain a different number of characters but you just want to sed to find any lines with 'user=' and replace the part after 'user=' with 'xxx' no matter what?
and...
if what to replace say 'AM' in a text file with 'JO', i can do:
but what if the text file where i'm running this looks like this:
AM
TAME
am
jammy
I only want to replace the following lines with 'JO':
AM
am
so I want to leave 'TAME' and 'jammy' in there - the sed above will give this:
JO
TJOE
jo
JJOMY
I want:
JO
TAME
jo
jammy
how do you achieve that with SED?
Cheers!
Last edited by rich@ardz; 09-01-2010 at 12:07 PM..
Reason: Code tags :)
Hello,
Actually i want to replace the word after a matched pattern.
For Ex:
lets say that i am reading a file line by line
while read line
do
echo $line
# i need to search whether a pattern exists in the file and replace the word after if the pattern exist.
# for example :... (1 Reply)
I am really need help with the regular expression in SED. From input file, I need to extract lines that have the port number (sport or dport) as defined. The input file is something like this
time=1209515280-1209515340 dst=192.168.133.202 src=208.70.8.23 bytes=2472 proto=6 sport=80 dport=1447... (6 Replies)
I would like to use sed to replace one occurence of a pattern in a file. When I use the s/// command it replaces all occurences of the pattern in the file. Should I be using something other than sed?
Thanks (6 Replies)
Hello,
The following sed command is giving error
sed: -e expression #1, char 13: unknown option to `s'
The sed command is
echo "//-----" | sed "s/\/\/---*/$parChk/g"
where parChk="//---ee-"
How can i print the variable value from sed command ?
And is it possible to replace a... (2 Replies)
Hi
I have a piece of xml that has a pattern like this
<int>159</int><int>30</int>
I want to find this pattern but only substitute the second part of the pattern to {rid1}.
Is that possible in sed ?
Thanks.
---------- Post updated at 12:10 PM ---------- Previous update was at 12:01 PM... (11 Replies)
Hi,
Thanks for looking at this issue.
I have many words/lines in a files like below
apple
pine apple
custored apple apple
apple
if i want to replace only/exact apple occurrences with XXX i could use below,
sed 's/\<apple\>/XXX/g' filename
this is working in Linux, but now in my free BSD... (3 Replies)
I have a file that has the words I want to find in other files (but lets say I just want to find my words in a single file). Those words are IDs, so if my word is ZZZ4, outputs like aaZZZ4, ZZZ4bb, aaZZZ4bb, ZZ4, ZZZ, ZyZ4, ZZZ4.8 (or anything like that) WON'T BE USEFUL.
I need the whole word... (6 Replies)
Hi Folks,
Could you please advise what will be the SED command to replace a word in all xml's under a particular directory
for example let say I rite now at the following below location
$ cd /ter/rap/config
now under config directory there will be lots of xml file , now my objective is to... (1 Reply)
Hi Team,
I am facing a problem as under, Suppose I have a file (test.txt) with the below content (all braces and slashes are included in the contents of the file)
Now I want to append few words below matched line, I have written the below sed:
sed '/option/a insert text here' test... (2 Replies)
Hi Folks ,
I have to replace the following value in all the xml files so the value is
tcp://pondevpms1.fm.rbsgrp.net:6033,pondevpms2.fm.rbsgrp.net:6033
and the value with it need to be replaces is shown below
tcp://pondevpms1:3063
so i have fired the below command inside... (3 Replies)
Discussion started by: unclesamm
3 Replies
LEARN ABOUT REDHAT
switch
switch(n) Tcl Built-In Commands switch(n)
__________________________________________________________________________________________________________________________________________________NAME
switch - Evaluate one of several scripts, depending on a given value
SYNOPSIS
switch ?options? string pattern body ?pattern body ...?
switch ?options? string {pattern body ?pattern body ...?}
_________________________________________________________________DESCRIPTION
The switch command matches its string argument against each of the pattern arguments in order. As soon as it finds a pattern that matches
string it evaluates the following body argument by passing it recursively to the Tcl interpreter and returns the result of that evaluation.
If the last pattern argument is default then it matches anything. If no pattern argument matches string and no default is given, then the
switch command returns an empty string.
If the initial arguments to switch start with - then they are treated as options. The following options are currently supported:
-exact Use exact matching when comparing string to a pattern. This is the default.
-glob When matching string to the patterns, use glob-style matching (i.e. the same as implemented by the string match command).
-regexp When matching string to the patterns, use regular expression matching (as described in the re_syntax reference page).
-- Marks the end of options. The argument following this one will be treated as string even if it starts with a -.
Two syntaxes are provided for the pattern and body arguments. The first uses a separate argument for each of the patterns and commands;
this form is convenient if substitutions are desired on some of the patterns or commands. The second form places all of the patterns and
commands together into a single argument; the argument must have proper list structure, with the elements of the list being the patterns
and commands. The second form makes it easy to construct multi-line switch commands, since the braces around the whole list make it unnec-
essary to include a backslash at the end of each line. Since the pattern arguments are in braces in the second form, no command or vari-
able substitutions are performed on them; this makes the behavior of the second form different than the first form in some cases.
If a body is specified as ``-'' it means that the body for the next pattern should also be used as the body for this pattern (if the next
pattern also has a body of ``-'' then the body after that is used, and so on). This feature makes it possible to share a single body among
several patterns.
Beware of how you place comments in switch commands. Comments should only be placed inside the execution body of one of the patterns, and
not intermingled with the patterns.
Below are some examples of switch commands:
switch abc a - b {format 1} abc {format 2} default {format 3}
will return 2,
switch -regexp aaab {
^a.*b$ -
b {format 1}
a* {format 2}
default {format 3}
}
will return 1, and
switch xyz {
a
-
b
{
# Correct Comment Placement
format 1
}
a*
{format 2}
default
{format 3}
}
will return 3.
SEE ALSO
for(n), if(n), regexp(n)
KEYWORDS
switch, match, regular expression
Tcl 7.0 switch(n)