Count the number of occurrences of a string with a variable substring in a file in bash

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I want to count the number of occurrences of a string Exiting with return code $var in a text file dump.out where 0<$var<29.

i.e. I only want to consider the strings where $var is any value between 0 and 29 including both the limits.

I want to check it like this:

if [ $(grep -c "Exiting with return code 0" dump.out) -ne 5 ]; then
  rc=1
  exit 0
fi

But here only string with 0s are considered.

Any suggestions will be helpful!

You can try this:

grep -c -E 'Exiting with return code [12]?[0-9]([^0-9]|$)' dump.out

-E let grep use the extended regex (ERE) [12]?[0-9] is matching numbers 0,1,...,29 ([^0-9]|$) matches the end of the line or anything except a digit

Count the number of occurrences of a substring in a string, I would like something like the hypothetical example below. In this case we use two Shell variables (Bash). EXAMPLE: STRING="0: asus-wlan  I need to count the number of occurrences of a char in a string using Bash.. In the following example, when the char is (for example) t, it echos the correct number of occurrences of t in var, but when the character is comma or semicolon, it prints out zero:

For 0 <= $var <= 29

grep -c 'Exiting with return code \([0-9]\|[12][0-9]\)'

For 0 < $var < 29

grep -c 'Exiting with return code \([1-9]\|1[0-9]\|2[0-8]\)'

Note that it can match 134, as it start with 1, so you might need to specify the following character (or $ if there's none).

How to Count Word Occurrences in a Text File, How do you count the number of occurrences using grep? I am kinda struggling to write a command which counts how many times a sub-string appears in a string. Instead of running the code below 10 times, I would rather previously count how many times th

Try this may be this will help

grep -w -c "Exiting with return code [012][0-9]\|Exiting with return code [0-9]" dump.out

How to Count the Number of lines, Words, and, Characters in a Text , the number of lines, words, and characters in a text file. You can use UNIX / Linux command such as sed, grep, wc or bash shell itself to count number of characters in a string or word or shell variable. grep Command To Count Number of Characters Use the following syntax to count ‘s’ character in a variable called $x: x = "This is a test" grep -o "s" <<< " $x " | wc -l

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Substrings in Bash, I assume it can be done better with awk , but this is the best I can offer. grep -zo "​Bluetooth\s*Soft blocked: no\s*Hard blocked: no" file_name | grep -c "Bluetooth". Objective: Count the number of occurrences of a single character in a string. Counting of a single character can be accomplished using a combination of grep and wc or by just using bash parameter expansion. Let’s say we want to count the number of ‘l’ from the following string. $ str1="hello world. HELLO WORLD."

BASH, For example let's count number of occurrences of a character l : bash shell command counts how many times a character l appears in file  For example “3382” is a substring of “this is a 3382 test”. One can extract the digits or given string using various methods. This quick tutorial shows how to obtain or finds substring when using bash shell. Extract substring in Bash. The syntax is: ## syntax ## ${parameter:offset:length} The substring expansion is a bash feature.