lower case to upper case

Shell Programming and Scripting
1

Hi i want to change lower case letters from lower case to upper case for only one particular column.

so my file looks like this

YU09m  ERTR
YU88j    UIOE

I want to change it so the letters all on column 1 are upper case

YU09M  ERTR
YU88J   UIOE

thanks:)

2

Try:

sed 's/[^ \t]*/\U&/' infile
3

If your sed doens't do that (as mine doesn't)...

awk '{$1 = toupper($1)}1' infile
4

or tr:

tr -s '[:lower:]'  '[:upper:]'  < oldfile > newfile