sed command to insert tab?

iluvatar · 06-28-2004, 04:06 AM

Hello everybody,

I need a simple sed script wich has to replace "BESCH<tab>112" with "BESCH<tab>102". sed detects the <tab> with [[:space:]] but how do I insert a tab in the replacement string?

Greetingz,
.-=~ iluvatar ~=-.

arvind_sv · 06-28-2004, 04:29 AM

sed 's/^$BESCH[[:space:]]$.*$/\1102/'

Arvind

iluvatar · 06-28-2004, 04:48 AM

Thanx, works perfectly although I don't know why... I have to read more about this...

greetz,
.-=~ iluvatar ~=-.

arvind_sv · 06-28-2004, 09:29 AM

sed 's/^$BESCH[[:space:]]$.*$/\1102/'

^ - Beginning of line.
$ - Start saving till corresponding $
BESCH[[:space:]] - Pattern
\) - End save. Saved as \1 as it's the first pattern.
.*$ - Everything till end of line.
/ - End pattern, start action.
\1 - Put in first saved pattern (which is BESCH followed by a space)
102 - Put this in too.

Arvind

iluvatar · 06-29-2004, 01:56 AM

Thanks! sed seems to be much more complicated AND much better than I thought

It's great to have this community too.

greetz,
.-=~ iluvatar ~=-.