Shell Programming and Scripting

Code:

-i

is not supported on HP-UX.

Code:

sed: illegal option -- i
Usage: sed [-n] [-e script] [-f source_file] [file...]

In that case you will have to use the "> newfile.txt" option then copy "newfile.txt" to the old file name.

At least with sed anyway.

Another way would be to adopt the perl method mentioned by birei.

To edit a text file, a text editor seems a natural choice.


With ex:

Code:

ex -sc '%s/encoding=""/encoding="UTF-8"/g|x' file

With ed:

Code:

ed -s file <<'EOED'
1,$s/encoding=""/encoding="UTF-8"/g
w
q
EOED

A less readable but equivalent ed one-liner:

Code:

printf '%s\n' '1,$s/encoding=""/encoding="UTF-8"/g' w q | ed -s file

On an unrelated and pedantic note, neither GNU's sed -i ... nor perl -i edit anything in place. While those options are convenient, they create and rename a temp file just as you would by using shell redirection and the mv command. To the underlying filesystem, the result is a new file with a different inode. ed and ex, however, actually do edit the file in place.

Regards,
Alister

Another problem is that I have to change that in 30000 files

hello everyone.

in connection with this thread. i would like to ask if it is possible that I use sed in replacing a string in an entire column? how do i incorporate a specific column, like $2 to the format of sed since it only accepts string

Code:

sed 's/'"string1"'/'"string2"'/g'