"Nabin Limbu" <nlimbu@xxxxxxxxxxxxxxxx> writes:
> Hi,
>
> In my script, I need to read a file name and change its first
> character of file name with another predefined character. How can I
> do that with shell scripting.
>
> for example:
>
> if A = "glow"
>
> then, B should be "blow" ("g" replaced by "b")
> ( glow -> blow )
Here is one way but it assumes all file names begin with lower or
upper case letters:
#!/bin/bash
## Slurp first command line argument as predefined letter
predefined_char=$1
## Get rid of var $1
shift
## Get a list of file names in current directory
for ii in $(ls);do
## Push existing name ($ii) thru sed to drop first letter
## and insert predefined letter
## NOTE: The quations used in line below are VERY important
echo $ii|sed 's/^[a-zA-Z]/'"$predefined_char"'/'
done
To add in filename beginning with letters to use:
sed 's/^[a-zA-Z0-9]/'"$predefined_char"'/'
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