WebMay 26, 2011 · According to the five-or-more-rule the following should have worked: Code: $ [ \ ( 1 -a -1 \) -a 4 ] && echo true bash: [: -1: unary operator expected $ [ 1 -a \ ( -1 -a 4 \) ] && echo true bash: [: -1: unary operator expected. At least with braces the expr. within should have been evaluated according to the three-argument-rule. WebDec 4, 2009 · unary operator expected hi i am trying to compare a value with value 50. but i am getting " I am using if then echo "------------" fi please help thanks in advance Satya (2 Replies)

"unary operator expected" error in Bash if condition

WebOperator precedence determines how operators are parsed concerning each other. Operators with higher precedence become the operands of operators with lower precedence. WebMar 6, 2009 · Hiya all, Why do I get a :unary operator expected when I try to put a condition statement in my shell script (sh) like so and how to fix? if ; then echo "say hello" else echo "don't say hello" fi ? It seems if the script receives an argument it works but if I don't put an... (4 Replies) Discussion started by: cyberfrog ... in browser virus scan

bash - [: Drink: Unary operator expected - Ask Ubuntu

WebApr 5, 2024 · If you want to see if a variable is empty, you can use the -z flag instead of comparing. The -z flag checks if the length of the variable is zero, and it returns true if it is zero.. Command: WebDec 26, 2024 · fi + '['-eq 1 ']'./ unity_check. sh: line 3: [:-eq: unary operator expected + echo 'Not equal to One !!' Not equal to One!! We can see from the debug log that the if … in browser website editing muse