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bash if command result is empty

without the $ sign. You can have as many commands here as you like. I hope that's cleared things up a bit. 3 Basic Shell Features. Bash has become a de facto standard for shell scripting on most flavors of UNIX. Bash's read does and that leads us to the loop above. A shell is the command interpreter for the operating system. is executed and Matches! stdin) … bash,command-line-arguments. The while loop is another popular and intuitive loop you can use in bash scripts. The CONSEQUENT-COMMANDS list that follows the then statement can be any valid UNIX command, any executable program, any executable shell script or any shell statement, with the exception of the closing fi.It is important to remember that the then and fi are considered to be separated statements in the shell. When the results are returned to the shell program, it sends them to STDOUT which, by default, displays them in the terminal. The == comparison operator always results in a string comparison. Bash is an acronym for ‘Bourne-Again SHell’.The Bourne shell is the traditional Unix shell originally written by Stephen Bourne. the BASH manual page): java -jar script.jar <

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