Count word frequency in a specific file

It is interesting to count the frequency of words used in a specific file to find out the word frequency. Next, we use the associated array, awk, sed, grep and other methods to solve the problem. First, you need to save the name as word.txt for a test as follows: [p... it is interesting to count the frequency of words used in a specific file to find out the word frequency. Next, we use the associated array, awk, sed, grep and other methods to solve the problem. First, we need a text for testing. save the content named word.txt as follows: [python] Word used this counting this next we need to write a Shell script program, as shown below: [python] #! /Bin/bash # Name: word_freq.sh # Description: Find out frequency of words in a file if [$ #-ne 1]; then echo "Usage: $0 filename "; exit-1 fi filename = $1 egrep-o "\ B [[: alpha:] + \ B "$ filename | \ awk '{count [$0] ++} END {printf (" %-14 s % s \ n "," Word ", "Count"); \ for (ind in count) {printf ("%-14 s % d \ n", ind, count [ind]);} 'Working principle: 1. egrep-o "\ B [[: alpha:] + \ B" $ filename is used to output only words, and the-o option is used to print matching character sequences separated by line breaks, In this way, a word 2. \ B is a word boundary identifier in each line. [: Alpha:] is a character class that represents letters. 3. the awk command is used to avoid running each word following an iteration: