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Using sed command replace date variable in unix

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# 1  
Old 04-19-2012
Using sed command replace date variable in unix
I need to use a shell script, using sed command how to replace date variable value in following format.

04/18/2012 11:38:55


Because the sed is treating the '/' as a parameter instead of the value of a variable, and hence there is the message as
Code:
sed: command garbled: s/insert/04/18/2012

PLease help me as I am new to this scripting.

Thanks
Suresh
Last edited by Scrutinizer; 04-19-2012 at 10:24 AM.. Reason: code tags
# 2  
Old 04-19-2012
Use another separator, eg:

Code:
sed 's!<pattern>!04/18/2012 11:38:55!'

# 3  
Old 04-19-2012
Thanks Franklin for the reply.

Well, the actual command I use in the script is like this..

Code:
sed "s/insert/'$STR1'/g" filename

where insert should be replaced with the value of the parameter 'STR1' which is eg. 04/18/2012 11:38:55

I am getting the following error message.

Code:
sed: command garbled: s/insert/'04/18/2012 11:38:55'/g

Hence could you please tell me exactly how can I use it in the script. Thanks in advance, Suresh.
Moderator's Comments:
Mod Comment Welcome to the UNIX and Linux Forums. Please use code tags. Video tutorial on how to use them
# 4  
Old 04-19-2012
also this:
i am agree with Franklin52.You can use any character that is not used in the entire expression for any other purpose as a separator instead of slash /.But there is another way here-
shell can be made to ignore special meaning of embedded slashes and treat them as literals by using backslash.So,use \ for each separating slash in date field like dd\/mm\/yyyy.
# 5  
Old 04-19-2012
Quote:
Originally Posted by jannusuresh
Thanks Franklin for the reply.

Well, the actual command I use in the script is like this..

Code:
sed "s/insert/'$STR1'/g" filename

where insert should be replaced with the value of the parameter 'STR1' which is eg. 04/18/2012 11:38:55

I am getting the following error message.

Code:
sed: command garbled: s/insert/'04/18/2012 11:38:55'/g

Hence could you please tell me exactly how can I use it in the script. Thanks in advance, Suresh.
try like this Smilie
Code:
# sed "s#insert#$STR1#g"

# 6  
Old 04-19-2012
the correct format of using the substitution command in sed is:
Code:
sed 's/pattern1/pattern2/g' filename

and inside '....' for variable evaluation use "$variable".

I hope the error should not come now.
Last edited by Franklin52; 04-19-2012 at 10:52 AM.. Reason: Please use code tags for data and code samples
# 7  
Old 04-19-2012
You cannot substitute variables inside single quotes, must be double quotes.
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