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Can someone post me the significance of -z option while writing if condition using shell scripts.
Let me paste the exact condition what I am looking at
if [[ "x$do_clean_flag" = "x-clean" && -z "$show_me_flag" && "$verify" = true ]] 
588
if is a command in Linux which is used to execute commands based on conditions. The 'if COMMANDS' list is executed. If its status is zero, then the 'then COMMANDS' list is executed.
If specified condition is not true in if part then else part will be execute. To use multiple conditions in one if-else block, then elif keyword is used in shell. If expression1 is true then it executes statement 1 and 2, and this process continues. If none of the condition is true then it processes else part.
$# : This variable contains the number of arguments supplied to the script. $? : The exit status of the last command executed. Most commands return 0 if they were successful and 1 if they were unsuccessful. Comments in shell scripting start with # symbol.
What is the Bash if Statement? Bash scripts help automate tasks on your machine. The if elif else statement in bash scripts allows creating conditional cases and responses to specific code results. The if conditional helps automate a decision-making process during a program.
From "help test":
-z STRING True if string is empty. If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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