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 — The -z option in bash scripting is a test operator that checks if a string is null. In simpler terms, it checks if the string is empty or not.
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 ...
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.