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# 1  
Old 11-19-2010
sed question
Hello Folks,


Can someone explain what does the following command mean.
Code:
sed 'y/^biecn/CFKZNT/' $1

the middle part will replace biecn with FKZNT and stores the values in 1st.

any ideas?
Last edited by Scott; 11-20-2010 at 06:55 AM.. Reason: Code tags
# 2  
Old 11-19-2010
This is basically a transform command where all 'b' transforms to 'C', 'i' to 'F','e' to 'K' etc.. $1 is the input file where all these changes takes place. For letter 'b' alone to change to 'C' it should be the starting letter of the line..(^ indicates first position of a line)
# 3  
Old 11-20-2010
Thanks for you reply.

If i run the above script on the file.txt
Code:
cat file.txt
beware it's still relatively early in the smartphone game, and it's still an open question how low the price will go.

Output i get is
Code:
FZwarZ Kt's stKll rZlatKvZly Zarly KT thZ smartphoTZ gamZ, aTd Kt's stKll aT opZT quZstKoT how low thZ prKNZ wKll go.

It is transforming 'b' into 'F' and 'i' into 'K' and so on. I think 'y/^ has some different meanings.
Last edited by Scott; 11-20-2010 at 06:56 AM.. Reason: Code tags
# 4  
Old 11-20-2010
gotcha..seems ^ has no special meaning here. ^ is replaced by 'C' hence 'b' by F, 'i' by 'K' etc..
This User Gave Thanks to michaelrozar17 For This Post:
huko99
# 5  
Old 11-20-2010
yes, it make sense.

but what does 'y means?

---------- Post updated at 11:32 PM ---------- Previous update was at 11:27 PM ----------
Code:
cat script
sed 'y/^biecn/CFKZNT/' $1

./script file.txt

what would be the meaning of $1 in this case?
Last edited by Scott; 11-20-2010 at 06:56 AM.. Reason: Code tags
# 6  
Old 11-20-2010
y - is the syntax for sed to make those replacements happen. $1=file.txt, so literally it means
Code:
sed 'y/^biecn/CFKZNT/' file.txt

Last edited by michaelrozar17; 11-20-2010 at 02:17 AM..
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