Contents
What does usr bin env bash do?
/usr/bin/env bash The /usr/bin/env run a program such as a bash in a modified environment. It makes your bash script portable. The advantage of #!/usr/bin/env bash is that it will use whatever bash executable appears first in the running user’s $PATH variable.
What is the difference between bash and bin bash?
The answer to this question is, ” -bash denotes a login shell and /bin/bash denotes a non-login shell.” The answer to the other question is a list of differences between login shells and non-login shells.
Why do bash scripts start with bin bash?
Bash has evolved over the years taking code from ksh and sh . 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”.
What is the difference between ” # ! / usr / bin / env Bash “?
If the shell scripts start with #!/bin/bash, they will always run with bash from /bin. If they however start with #!/usr/bin/env bash, they will search for bash in $PATH and then start with the first one they can find. Why would this be useful?
Is there any difference between Bash and bin?
I have seen some scripts starting with #!/bin/sh or #!/bin/bash. Is there any difference between them? bash and sh are two different shells. Basically bash is sh, with more features and better syntax. Most commands work the same, but they are different.
What’s the difference between Ubuntu bin / sh and Dash?
Most commands work the same, but they are different. Having said that, you should realize /bin/sh on most systems will be a symbolic link and will not invoke sh. In Ubuntu /bin/sh used to link to bash, typical behavior on Linux distributions, but now has changed to linking to another shell called dash.
Is there any difference between Bash and SH?
Is there any difference between them? bash and sh are two different shells. Basically bash is sh, with more features and better syntax. Most commands work the same, but they are different. Having said that, you should realize /bin/sh on most systems will be a symbolic link and will not invoke sh.