How to read a string variable and compare it with string constant in bash

April 18, 2022

I need to read a string variable and to check if it’s equal to string ‘qwe’.
I try this code:

read VAR1
if ["$VAR1" == "rwx"]; then
    current=$current+1
fi

but terminal says

[rwx : command not found

MEDevel.com: Open-source for Healthcare and Education

Collecting and validating open-source software for healthcare, education, enterprise, development, medical imaging, medical records, and digital pathology.
Visit Medevel

>Solution :

[ is a command, not just syntax. Commands need to be separated from their arguments with whitespace:

if [ "$VAR1" = "rwx" ]; then ...
#   ^               ^

See help if at an interactive prompt:

$ help if
if: if COMMANDS; then COMMANDS; [ elif COMMANDS; then COMMANDS; ]... [ else COMMANDS; ] fi
    Execute commands based on conditional.

    The `if COMMANDS' list is executed.  If its exit status is zero, then the
    `then COMMANDS' list is executed...

There’s nothing in there about [...], what comes after if is a command list, and the exit status determines the "success" of the conditional.