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sed -i 's/2019/2020/g' test.txt test2.txt test3.txt #Find #Replace #sed

Enter newline at the end of the file $ sed -i -e '$a\' file #NewLine #Sed #Line #New

Sed illegal charters from fasta. $ sed '/^[^>]/ s/[^AGTC]/N/gi' < seq.fa #fasta #otherthanATGC #replace #sed #Linux #illegal

Remove the unwanted characters from Fasta file: sed -e '/^[^>]/s/[^ATGCatgc]/N/g' infile.fa #sed #unwanted #illegal #remove #correct #fasta #linux

Remove "|" from fasta header. $ sed 's,|,_,g' -i file.fa #fasta #header #sed

Remove four beginning characters from each line of the file. $ sed 's/^....//' genbank.txt #Remove #Sed #Text

Append the string to fasta header. $ sed 's/>.*/&_Bacteria/' foo.in > out.fasta #Sed #Fasta #String #Append

Filter #blank #lines from a #fasta file using sed. $ sed '/^$/d' finalSample.fa > finalSample_filtered.fa #Linux #Filter #FASTA #SED

To clean up a fasta file so only first column of the header is outputted:$ awk '{print $1}' file.fa > output.fa #Sed #Clean #Header #Fasta

Add ">" in front of ids. sed -e 's/^/prefix/' file #Sed #Add #>

#Remove all line that start with # file: $ sed '/^#/ d' filename #line #sed #linux