}while[ 1 ]domenucase$optionin0)echo"exit code 0, 退出循环"break;; 1)echo"Display Disk Space"display_disk_space ;; 2)echo"Display Logged Users"display_logged_users ;; 3)echo"Display Memory Usage"display_memory_info ;; 4)echo"Display CPU Info"display_cpu_info ;; *) clearecho"default...
shell script error[: :需要整数表达式 shell script error[: -eq:需要一元表达式 shell script error[: ==:需要一元表达式 solutions ✅ 如果if 语句使用的是单层方括号[ ]条件修饰符, 变量必须加上双引号 如果if 语句使用的是双层方括号[[ ]]条件修饰符, 变量就不需要引号了 ...
Rosetta 2 is required to run x64 (Intel) version of apps on Apple Silicon Macs. To install Rosetta 2 on Apple Silicon Macs automatically, you can deploy a shell script in Intune. To view a sample script, seeRosetta 2 Installation Script. ...
echo "printing ${val}" fi done Break Statement Skip an Iteration with continue Statement What if you don’t want to completely exit out of the loop but skip the block of code when a certain condition is met? This can be done with acontinuestatement. Thecontinuestatement will skip the exe...
As you saw, the magic variable$@contains the list of all arguments received by the script. You can use a loop to process all the arguments: #!/bin/bash echo "We received $# argument(s)" for i in "$@" do echo "Arg...: $i" ...
Alternatively, you can load jsh directly into your current shell: . jsh/startj But if you only want the scripts on your PATH, and crucial initialisation, but none of the visual shell tweaks: . jsh/startj-simple All that script really does is this (so you could do it manually if you ...
echo"$f" done Using Command Substitution in a Shell Script The above examples are a few ways in which you can utilize the power of command substitution in your shell script. Here is a sample status report that we can print using the following shell script: ...
2. Embed Shell Variable Naturally, one way to use the value of a shell variable in AWK is to directly interpolate it within the context of a string, i.e., the script: $ var='data' $ awk 'BEGIN { print "shell_var='"$var"'" }' shell_var=data Here, we glue quotes appropriately...
echo"Hello,$(whoami)!" Copy Hello, taniarascia! User Input We declared a variable in the last example, but we can also have the user set the value of a variable dynamically. For example, instead of just having the script sayHello, World!, we can make it ask for the name of the pe...
echo ${num[*]} 1 2 3 4 5 You can delete the 3rdelement of the num array by using the unset shell built-in: unset num[2] Now, if you print all the values of the num array: echo ${num[*]} 1 2 4 5 As you can see, the third element of the array num has been deleted....