Practical guide on the uses of both if z and if n statements to help the Bash users to properly apply these statements in their script using multiple ...
Shell Scripting with Bash and Z Shell. This skill focuses on creating shell scripts using Bash and/or Z Shell to automate just about any task on a UNIX system.
2014年1月16日 — I have a shell script where we have following lines if [ -z $xyz ] and if [ -n $abc ] , but I am not sure what their purpose is. Can anyone ...
2018年7月20日 — Bash operators: ! vs -z ... What is the difference between the operator ! and -z applied to a string? #Example 1 if [ ! STRING ]; then ...
The -z option is used to test whether the variable “string” is empty so if the variable is empty, the script executes the code in the “if” block, and if it is ...
2023年12月6日 — In bash scripting, the -z option checks if a string is null or empty. It can be used in an if statement, with the syntax if [ -z $variable ] .