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Language check (#25216)

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Grammar and punctuation fix
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qme1519
2018-12-19 12:28:27 +04:00
committed by Manish Giri
parent 3920b20718
commit 61cd19eccd
1 changed files with 6 additions and 4 deletions
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10
guide/english/bash/index.md
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@ -37,12 +37,14 @@ You can also put all of your bash commands into a .sh file, and run them from th
#!/bin/bash #!/bin/bash
echo "Hello world!" echo "Hello world!"
``` ```
It's worth noting that first line of the script starts with `#!`. It is a special directive which Unix treats differently. It's worth noting that the first line of the script starts with `#!`. It is a special directive which Unix treats differently.
#### Why did we use #!/bin/bash at the beginning of the script file? #### Why did we use #!/bin/bash at the beginning of the script file?
That is because it is a convention to let the interactive shell know what kind of interpreter to run for the program that follows. The first line tells Unix that the file is to be executed by /bin/bash. This is the standard location of the Bourne shell on just about every Unix system. Adding #!/bin/bash as the first line of your script, tells the OS to invoke the specified shell to execute the commands that follow in the script.
`#!` is often referred to as a "hash-bang", "she-bang", or "sha-bang". That is because it is a convention to let the interactive shell know what kind of interpreter to run for the program that follows. The first line tells Unix that the file is to be executed by /bin/bash. This is the standard location of the Bourne shell on just about every Unix system. Adding #!/bin/bash as the first line of your script tells the OS to invoke the specified shell to execute the commands that follow in the script.
Though it is only executed if you run your script as an executable. For example, when you type `./scriptname.extension`, it will look at the top line to find out the interpreter, whereas, running the script as `bash scriptname.sh`, first line is ignored. `#!` is often referred to as a "hash-bang", "she-bang" or "sha-bang".
Though it is only executed if you run your script as an executable. For example, when you type `./scriptname.extension`, it will look at the top line to find out the interpreter, whereas, running the script as `bash scriptname.sh`, the first line is ignored.
Then you could run the script like so: Then you could run the script like so:
For make file executable you should call this command under sudo chmod +x "filename". For make file executable you should call this command under sudo chmod +x "filename".