text: user492: I have a DNA sequence for which I would like to quickly find the reverse complement. Is there a quick way of doing this on the bash command line using only GNU tools?
  
  user8749: You may either install the emboss package (http://emboss.sourceforge.net/download/) and use the revseq program.
  It contains many useful command-line programs such as the pairwise alignment tool needle.
  
  user9619: Reverse complement FASTA/Q:
  seqtk seq -r in.fa > out.fa
  
  https://github.com/lh3/seqtk
  
  user492: Thanks to Manu Tamminen for this solution:
  echo ACCTTGAAA | tr ACGTacgt TGCAtgca | rev
  
  
original_text: 492: <p>I have a DNA sequence for which I would like to quickly find the reverse complement. Is there a quick way of doing this on the bash command line using only GNU tools?</p>
   8749: <p>You may either install the emboss package (<a href="http://emboss.sourceforge.net/download/" rel="nofollow noreferrer">http://emboss.sourceforge.net/download/</a>) and use the revseq program.
  It contains many useful command-line programs such as the pairwise alignment tool needle.</p>
   9619: <p>Reverse complement FASTA/Q:</p>
  <pre><code>seqtk seq -r in.fa &gt; out.fa
  </code></pre>
  <p><a href="https://github.com/lh3/seqtk" rel="noreferrer">https://github.com/lh3/seqtk</a></p>
   492: <p>Thanks to <a href="http://manutamminen.info/posts/unix_tricks/" rel="noreferrer">Manu Tamminen</a> for this solution:</p>
  
  <pre><code>echo ACCTTGAAA | tr ACGTacgt TGCAtgca | rev
  </code></pre>
  