There are two kinds of loops in the Bourne shell: for and while loops. Bourne shell 有两种循环:for 循环和 while 循环。 11.6.1 for Loops(for 循环) The for loop (which is a “for each” loop) is the most common. Here’s
After creating a shell script and setting its permissions, you can run it by placing the script file in one of the directories in your command path and then running the script name on the command line. You can also run ./script if the script is located in your current working directory,...
$ MYVAR="Linux Shell Scripting" $ echo $MYVAR Linux Shell Scripting $ set | grep MYVAR # MYVAR local variable is created MYVAR='Linux Shell Scripting' $ bash # Creating a new bash sub-process in current bash $ set | grep MYVAR $ # Blank because MYVAR is local variable 要使变量对其...
As long as thewhileloop condition remains true, the code block within the loop is executed repeatedly.In contrast, the loop terminates if the condition evaluates to false. 3. Including User Input Into awhileLoop Condition In shell scripting, using user input as a condition for awhileloop adds...
https://en.wikibooks.org/wiki/Bash_Shell_Scripting/Whiptail Newt Newtis a programming library for color text mode, widget-based user interfaces. Newt can be used to add stacked windows, entry widgets, checkboxes, radio buttons, labels, plain text fields, scrollbars, etc., to text user inter...
uniq At first glance, uniq appears to be a tool that displays only unique lines in a file. In reality, it strips consecutive repeated lines, but if the same line … - Selection from Shell Scripting: Expert Recipes for Linux, Bash, and More [Book]
MethodException: Line | 5 | $intList.Add('Four') | ~~~ | Cannot convert argument "item", with value: "Four", for "Add" to type "System.Int32": "Cannot convert value "Four" to type "System.Int32". Error: "The input string 'Four' was not in a correct format."" 1 2 3...
在read -s读取终端键时，终端的属性会被暂时改变。 #如果在read -s时程序被不幸杀掉，可能会导致...
For Loops Unlike most loops, the for loop does not test the condition of a variable each time it goes around the loop. Instead, it starts with a list of … - Selection from Shell Scripting: Expert Recipes for Linux, Bash, and More [Book]
select word in "linux" "bash" "scripting" "tutorial" do echo "The word you have selected is: $word" # Break, otherwise endless loop break done exit 0 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 15. Case statement conditional ...