Use of WC command

List of articles

1.1 Compression and decompression commands
2.1 head、tail see file
3 grep Text search tools
4 The Conduit | And redirect >
5 wc Use of commands

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One 、wc

wc Commands come from English phrases “Word count” Abbreviation , Used to count the number of bytes of the file 、 Number of words 、 Lines and so on , And output the statistical results to the terminal interface .

Use format ：

wc [-option] filename

Common parameters ：

Parameters	significance
-l	The statistical number of rows
-w	Count the number of words
-c	Count the number of bytes
-m	Count characters
-L	Shows the length of the longest line

For example, count the number of file lines ：

wc -l all_viruses_nucleotide_sequences_20171115.fasta
540 all_viruses_nucleotide_sequences_20171115.fasta

Statistics fasta How many sequences does the file have ：

grep '>' all_viruses_nucleotide_sequences_20171115.fasta | wc -l
270

Count the number of bytes ：

wc -c all_viruses_nucleotide_sequences_20171115.fasta
2011124 all_viruses_nucleotide_sequences_20171115.fasta