Q: How do I get the last line in bash?

${str##*$'\n'} will remove the longest match till \n from start of the string thus leaving only the last line in input. Show activity on this post. Then, the first line would be ${lines[0]} , and the last line would be ${lines[-1]} .

Question 1

How do I read the last line of a file in Shell?

Accepted Answer

To look at the last few lines of a file, use the tail command. tail works the same way as head: type tail and the filename to see the last 10 lines of that file, or type tail -number filename to see the last number lines of the file.

Question 2

How do I get the last line in bash?

Accepted Answer

${str##*$'
'} will remove the longest match till 
 from start of the string thus leaving only the last line in input. Show activity on this post. Then, the first line would be ${lines[0]} , and the last line would be ${lines[-1]} .

Question 3

How read file line by line in shell script and store each line in a variable?

Accepted Answer

We use the read command with -r argument to read the contents without escaping the backslash character. We read the content of each line and store that in the variable line and inside the while loop we echo with a formatted -e argument to use special characters like 
 and print the contents of the line variable.

How to read the last line of a text file into a variable using Bash? [closed]

Tags:

linux

bash

git-bash

Tommy Liu

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