How do you do number comparison in shell scripts?
Compare Numbers in Linux Shell Script
- num1 -eq num2 check if 1st number is equal to 2nd number.
- num1 -ge num2 checks if 1st number is greater than or equal to 2nd number.
- num1 -gt num2 checks if 1st number is greater than 2nd number.
- num1 -le num2 checks if 1st number is less than or equal to 2nd number.
What is BC in shell script?
bc command is used for command line calculator. It is similar to basic calculator by using which we can do basic mathematical calculations. You can use these commands in bash or shell script also for evaluating arithmetic expressions.
How to count number of characters in file through shell script?
Can anyone tell me how to do this through shell script If you want only the count without the filename being repeated in the output: Use -m to count character instead of bytes (as shown in Sébastien’s answer). wc -m counts the number of characters; the awk command prints the number of characters only, omitting the filename.
How to do math calculations with an integer in Bash?
Doing Math in Bash with Integer Using the expr command line The legacy way to do math calculations with integer, and only integer, has been for a long time to use the expr command line. Though, this method can be slow as expr is a binary, not a shell builtin.
How to count the number of characters in a string?
To get exact character count of string, use printf, as opposed to echo, cat, or running wc -c directly on a file, because using echo, cat, etc will count a newline character, which will give you the amount of characters including the newline character.
Which is the best calculator language for Bash?
The most common one is “ bc – An arbitrary precision calculator language ”. To start the interactive mode, you simply need to type bc in your command prompt. You can use the -q (quiet) option to remove the initial bc banner. [me@linux ~]$ bc bc 1.06 Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.