At times you need to specify different courses of action to be taken in a shell script, depending on the success or failure of a command. The if construction ...
2022年8月3日 — We use if-else in shell scripts when we wish to evaluate a condition, then decide to execute one set between two or more sets of statements ...
The syntax of an bash if statement ... A short explanation of the example: first we check if the file somefile is readable (if [ -r somefile ]). If so, we read ...