It's not really a sed question, it's a shell question. An unquoted backslash is interpreted by the shell. In so many words, to get a backslash in a sed script, single-quote the script or double the backslashes. Either way is fine. The point is to protect them from the shell. Usually quoting is the preferred mechanism for anything longer than just a few characters.
The s command in sed requires three separators, one on each side and one in the middle. It can be any character but slash is often used. If you add more separators, you will produce a syntax error (sometimes a rather confused one, as sed will simply try to read whatever comes after the third separator as options to the substitution).
Last edited by era; 09-25-2008 at 06:16 AM..
Reason: s%from%to% explanation
Hello..
i want to use variable in sed..
like
sed 's/ROOTMAILID/$variable/g' conf.test
but its not working..
please help
thanks in advance
esham (2 Replies)
hi all,
i have a variable exported as
VAR=ATTRIB
then tried with,
echo "tt" | sed 's/^/$VAR/'
expected result as
ttATTRIB
but obtained only,
$VARtt
i could nt get where i am wrong.
Thanks. (3 Replies)
Hi,
Could you please explain me the below statement -- phrase wise.
sed -e :a -e '$q;N;'$cnt',$D;ba' abc.txt > xyz.txt
if suppose $cnt contains value: 10
it copies last 9 lines of abc.txt to xyz.txt
why it is copying last 9 rather than 10.
and also what is ba and $D over there in... (4 Replies)
This is my first post so hi to you all. I have browsed these forums in the past and what a great community and resource this is! Thanks to all the contributors ... I look forward to being able to give something back.
In the meantime, I have a little conundrum concerning sed. My very simple... (6 Replies)
Hi,
i need find and replace a sting with a new variable having value as spaces in between.
Eg:
set a = "i am variable"
set b = "i am second"
sed -e 's/find_string/'$a'/g' -e 's/find2_str/'$b'/g' input_file
here it is giving error...
How to get an varaible, which is... (6 Replies)
Hi Friends,
I am trying to modify a script .The script contains this line:
sed -n -e 's_.*>\(.*\)<.*_\1_p' filename.xml
I am not great in sed command.I know, it is regular expression
to match a pattern string that starts with s_ and ends with 1_.I doesnot give the desired result.
Can... (4 Replies)
sed '$!N; /^\(.*\)\n\1$/!P; D'
i found this file which removes duplicates irrespective for sorted or unsorted file. keep first occurance and remove the further occurances.
can any1 explain how this is working..
i need to remove duplicates following file. duplicate criteria is not the... (3 Replies)
Hi All
Can some one explain what does the given two sed commands do :confused:
sed "s/\'/\\\'/g" |
sed 's/\"/\\\"/g'
Please find the sample code i used to find out what this is doing , but it has confused me more :wall:
$ cat sri1.txt
\
'
"
$ sed 's/\"/\\\"/g' sri1.txt
\
'... (5 Replies)
Will someone give me an explanation on how the sed command below works.
sed 's/.*//'
Thanks! (3 Replies)
Discussion started by: scj2012
3 Replies
LEARN ABOUT SUSE
nwbpset
NWBPSET(1) nwbpset NWBPSET(1)NAME
nwbpset - Create a bindery property or set its value
SYNOPSIS
nwbpset [ -h ] [ -S server ] [ -U user name ] [ -P password | -n ] [ -C ]
DESCRIPTION
nwbpset Reads a property specification from the standard input and creates and sets the corresponding property. The format is determined by
the output of 'nwbpvalues -c'. nwbpset will hopefully become an important part of the bindery management suite of ncpfs, together with
As another example, look at the following command line:
nwbpvalues -t 1 -o supervisor -p user_defaults -c |
sed '2s/.*/ME/'|
sed '3s/.*/LOGIN_CONTROL/'|
nwbpset
With this command, the property user_defaults of the user object 'supervisor' is copied into the property login_control of the user object
'me'.
nwbpvalues -t 1 -o me -p login_control -c |
sed '9s/.*/ff/'|
nwbpset
This command disables the user object me.
Feel free to contribute other examples!
nwbpset looks up the file $HOME/.nwclient to find a file server, a user name and possibly a password. See nwclient(5) for more information.
Please note that the access permissions of $HOME/.nwclient MUST be 600 for security reasons.
OPTIONS -h
-h is used to print out a short help text.
-S server
server is the name of the server you want to use.
-U user
user is the user name to use for login.
-P password
password is the password to use for login. If neither -n nor -P are given, and the user has no open connection to the server, nwbpset
prompts for a password.
-n
-n should be given if no password is required for the login.
-C
By default, passwords are converted to uppercase before they are sent to the server, because most servers require this. You can turn off
this conversion by -C.
AUTHORS
nwbpset was written by Volker Lendecke. See the Changes file of ncpfs for other contributors.
nwbpset 8/7/1996 NWBPSET(1)