2 апр. 2016 г. · 1 Answer 1 ... One of the common command s we use is [ which is an alias for the command test . It is a simple command for comparing strings, ...

2 дек. 2017 г. · Assign command output to a variable and do if branch on the return value · 8 · Checking the success of a command in a bash `if [ .. ]` statement.

4 янв. 2018 г. · First, the idiomatic way to check if a command worked is directly in the if statement. if command; then echo notify user OK >&2 else echo ...

31 окт. 2014 г. · If you want your script to exit when that test returns true (the previous command failed) then you put exit 1 (or whatever) inside that if block ...

6 нояб. 2019 г. · From man wait(1): EXIT STATUS top. If one or more operands were specified, all of them have terminated or were not known by the invoking ...

5 февр. 2015 г. · Bash command if command succeed · The command was executed but there was no answer. · The command was executed OK but the result was not the one ...

16 апр. 2018 г. · In your case, you want success/failure not a conditional expression, so don't use the adapter. BTW, you'll also sometimes see if [[ some ...

27 авг. 2012 г. · A command does not return a string (it returns a small integer exit code, usually 0 for success and 1 or 2 on failure), but it may output some ...

19 июн. 2013 г. · If some_process is running, then "1" gets echoed, which is fine. However, if some_process is not running, nothing gets echoed. bash.

10 янв. 2020 г. · 1 Answer 1 · In the case of the ls command, it exits with 0 when ls is successful (finds something). Is this 0 exit code interpreted as TRUE?