Off topic:Changing Fasta Header

Question

[wanziyi89]

Dear Colleagues,

I would like to change my FASTA file header from this :

oreNil2_augustusGene_g25.t1 range=chrLG1:1047971-1161345 5'pad=0 3'pad=0 strand=+ repeatMasking=none

to this :

oreNil2_augustusGene_g25.t1

Basically removing all the lines after the space.

I know we can do this with sed or awk but my knowledge with this two commands are elementary at best. Any help here will be awesome!

regards,

Zi Yi