Hdi2u S22

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  • Try the command:
grep "^DE" hsy14768.embl and grep -x "DE.*" hsy14768.embl
  • What are the ^ symbol and the -x parameter in these commands doing?
  • You will need to check the manpage for grep to be sure.
  • Move to your home directory and type ls –lR
  • Use the above command with a pipe and a grep command to search for files created or modified today.
  • List the files in the hdi2u_files directory and use the grep command to look for those containing the
cat *seqs.fasta | grep "^>" | wc -l
  • Each sequence in a fasta file starts with a header line that begins with a >.
  • request for redirection of output to a file, rather than as a character to look for.
  • As before, the ^ symbol means "match only at the beginning of the line".