The first beta was released in 1989, and, as of this writing, has seen its most recent update in December 2020: version 5.1. Expressions may be unary or binary, and are formed from the following primaries. 6.4 Bash Conditional Expressions. The test and [commands determine their behavior based on the number of arguments; see the descriptions of those commands for any other command-specific actions.. bash definition: 1. to hit hard: 2. to criticize someone severely: 3. a party: . of a compound command OR function name { ## ksh style works in bash command1 command2 } OR function name() { ## bash-only hybrid command1 command2 } One Line Functions Syntax. [ -d FILE] True if FILE exists and is a directory. [ -b FILE] True if FILE exists and is a block-special file. Following is the syntax of Else If statement in Bash Shell Scripting. | Meaning, pronunciation, translations and examples What does bash mean? [ -g FILE] True if FILE exists and its SGID bit is set. Bash Else If is kind of an extension to Bash If Else statement. es v. tr. In bash the options and behaviors are defined by bash. Learn more. bash on definition: 1. to continue doing something that is difficult, boring, or takes a long time: 2. to continue…. It is also kind of a synonym for test. In Bash else-if, there can be multiple elif blocks with a boolean expression for each of them. 1. Bash Else If. Learn more. They otherwise work the same, [ -e foo ] is equivalent to test -e foo. if itself is a shell keyword, so you can find information about it with help if.if itself only branches based on whether the next command returns true ( 0 ) or false ( not zero ). [ -e FILE] True if FILE exists. 2. [ -c FILE] True if FILE exists and is a character-special file. If elif if ladder appears like a conditional ladder. name() compound_command ## POSIX compliant ## see the bash man page for def. ; The statements that follow the then statement can be any valid UNIX command, any executable user program, any executable shell script, or any shell statement with the exception of fi. Conditional expressions are used by the [[compound command and the test and [builtin commands. Here, The condition in the if statement often involves a numerical or string test comparison, but it can also be any command that returns a status of 0 when it succeeds and some nonzero status when it fails. The only real difference between [and test should be that [requires a ] after your arguments, whereas test does not. Primary Meaning [ -a FILE] True if FILE exists. Syntax of Bash Else IF – elif. To bash is to hit very hard or to say unkind things about someone or something. To strike with a heavy, crushing blow: The thug bashed the hood of the car with a sledgehammer. 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