28 сент. 2012 г. · The if statement in shell uses the command [. Since [ is a command (you could also use 'test'), it requires a space before writing the condition to test.

2 авг. 2021 г. · Use -eq for numeric comparisons, not for strings. Also, you are using quotes incorrectly. Use double quotes to prevent field splitting when you expand ...

16 апр. 2013 г. · The syntax to follow is: if [ conditions ]; then # Things elif [ other_conditions ]; then # Other things else # In case none of the above occurs fi

26 янв. 2017 г. · You want to run a loop of maximum of 4 cycles and in the loop to run a command and test its result, and exit the loop if the result is not empty.

14 мар. 2016 г. · I'm trying to make a script in bash that will allow me to change video drivers without having to navigate through configuration files every time I start up ...

3 июл. 2017 г. · I have written a bash script that does not show any errors. However I would like to add conditional block list if success then show email success else show ...

12 авг. 2013 г. · It looks as if you were on the right track. You just need to add the else statement after the ";" following the "then" statement.

26 июл. 2016 г. · I am trying to issue an if/else statement from a shell command but within perl. I've tried system and exec with no success. Here's a sample of the code.

30 июл. 2019 г. · Linux Shell Scripting: if/else works on bash but not zsh or sh · On my laptop within zsh (5.3.1), read doesn't work as expected (read: -p: no ...

1 мар. 2010 г. · This is a solution because the [[ construct is built into the shell while [ is another name for the test command and hence is subject to its syntax.