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Bash oneliner to extract all ids from a multifasta file
By biogeek 1531 days ago
#List of ids - one per line in allIds.txt
$ awk 'BEGIN{while((getline<"allIds.txt")>0)l[">"$1]=1}/^>/{f=!l[$1]}f' seq.fa
# You can play with this f=!l[$1 ] if wanted to extract or not extract the ids
