problem with sed

praneshmishra08 · #1 (**permalink**) 08-28-2008

hi friends

i have a file "myfile" using sed i want to replace a whole word which have a p alphabet in starting

input file:
pbm 123 456
ram 234 567

outfile;pbm have p at starting so replaced by mishra
mishra 123 456
ram 234 567

plz plz help me.

era · #2 (**permalink**) 08-28-2008

Code:

sed 's/^p[^ ]*/mishra/' file

praneshmishra08 · #3 (**permalink**) 08-28-2008

thanks but if file is

input :
pbm prav 234
ram shyam 789

output: both p replaced by mishra
mishra mishra 234
ram shyam 789

please give me reply.

thanks always.

era · #4 (**permalink**) 08-28-2008

If the input is foo par should the second p* be substituted? Do you have more requirements up your sleeve?

praneshmishra08 · #5 (**permalink**) 08-28-2008

thanks for reply
actually i have to replace each and every word which is starting with p in each and every line of any list.

era · #6 (**permalink**) 08-28-2008

Code:

sed 's/\<p[^ ]*/mishra/g' file

If your sed doesn't understand \< to mean word boundary, it's a bit tricky. Perhaps something like

Code:

sed 's/\(^\| \)p[^ ]*/\1mishra/g' file

praneshmishra08 · #7 (**permalink**) 08-28-2008

vow, it's working.
thanks a lot.

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