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In Bash, is there a simple way to test if one string is lexicographically less than or equal to another?
I know you can do:
if [[ "a" < "b" ]] for testing strict inequality, or
if [[ 1 -le 1 ]] for numbers. But -le doesn't seem to work with strings, and using <= gives a syntax error.
484
You can check the equality and inequality of two strings in bash by using if statement. “==” is used to check equality and “!= ” is used to check inequality of the strings. You can partially compare the values of two strings also in bash.
When comparing strings in Bash you can use the following operators: string1 = string2 and string1 == string2 - The equality operator returns true if the operands are equal. Use the = operator with the test [ command. Use the == operator with the [[ command for pattern matching.
The need to compare strings in a Bash script is relatively common and can be used to check for certain conditions before proceeding on to the next part of a script. A string can be any sequence of characters. To test if two strings are the same, both strings must contain the exact same characters and in the same order.
Details. Use == operator with bash if statement to check if two strings are equal. You can also use != to check if two string are not equal.
Just negate the greater than test:
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