Note that the correct way of creating new variables is without any spaces: VAR=42
, not VAR = 42
or VAR =42
or VAR= 42
.
If you try to create your own bash-script file and run it, Bash will complain about permissions. The reason is, your new text file is not set to be an executable program. Learn more about permissions from Wikibooks or just google "unix permissions".
To quickly fix your issue, do chmod +x your_bash_script_file
. This will add executable
to your file's permissions, and you'll be able to run it.
./program
just means "run program
that is located in the working directory". .
stands for the working directory, and /
is just a part of the path, same as in /home/something
.
If your program's location is in PATH
variable already, then you don't need to add ./
even if you're in the same directory with the program, because Bash already knows where to look for your program.
env
to view environment variablesVAR=value
to set a new environment variable named VAR
with value value
(e.g. BUILDING_NAME=Tory
)echo $VAR
to print out the value of VAR
VAR=value ./myscript
to run myscript
bash script file so that it knows the VAR
variableexport VAR=value
to export a variable to all sessions (it will appear in the env
list)PATH=/home/joe/apps:$PATH
to add /home/joe/apps
to the PATH
variable. Bash will look inside /home/joe/apps
when searching for commands and programss from now on.The Hexlet support team or other students will answer you.
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