xmfa_fix_scripts_extras.txt

sed 's/find/replace/' 6.eliz.core_alignment.xmfa



To remove everything except the 1st n characters in every line: 
sed -r 's/^>[." e*"]//' Test-to-remove-headers.txt

sed -r 's/^>..* -*/>/' Test-to-remove-headers.txt

NOTES:
You can remove one of the periods with no effect:
sed -r 's/^>.* -*/>/' Test-to-remove-headers.txt

If you escape the + and add a . you can remove only the headers with positive strands
sed -r 's/^>.* \+.*/>/' Test-to-remove-headers.txt > tested.txt

If you escape the - and add a . you can remove only the headers with positive strands
sed -r 's/^>.* \-.*/>/' Test-to-remove-headers.txt > tested.txt

You can escape the space with no effect:
 sed -r 's/^>.*\ -*/>/' Test-to-remove-headers.txt > tested.txt

Can use +- or -+ also
sed -r 's/^>.* -+*/>/' Test-to-remove-headers.txt > tested.txt
sed -r 's/^>.* +-*/>/' Test-to-remove-headers.txt > tested.txt

sed -r 's/.* />/' Also works (Thanks Dana!)