在Bash脚本,有3种类型loops:for loop,while loop, 和until loop. 这三个用于迭代值列表并执行一组给定的命令。 Bash For 循环语法 for loop遍历一系列值并执行一组命令。 For loop采用以下语法: forvariable_name in value1 value2 value3..ndocommand1 command2 comm
Standard Bash For Loop Over Strings Over a Number Range Over Array Elements Break and Continue for Loop Break Statement Continue Statement Examples of Bash for Loops Share Loops are one of the most powerful and fundamental programming concepts that allow users to execute a command or set of ...
Hopefully, these examples have demonstrated the power of aforloop at the Bash command line. You really can save a lot of time and perform tasks in a less error-prone way with loops. Just be careful. Your loops will do what you ask them to, even if you ask them to do something destr...
command1 command2 ... commandN fi if else if else 语法格式: if condition then command1 command2 ... commandN else command fi if-elif-else 语法格式: if condition1 then command1 elif condition2 then command2 else commandN fi for 循环 for 循环一般格式为: for var in item1 item2 ... ...
commandN done 1. 2. 3. 4. 5. 6. OR for OUTPUT in $(Linux-Or-Unix-Command-Here) do command1 on $OUTPUT command2 on $OUTPUT commandN done 1. 2. 3. 4. 5. 6. Examples This type of for loop is characterized by counting. The range is specified by a beginning (#1) and ending...
# For loop for i in {1..5}; do echo “Number: $i” done # While loop counter=1 while [[ $counter -le 5 ]]; do echo “Counter: $counter” counter=$((counter+1)) done “` 以上是编写 Bash 脚本的一些建议和示例。当然,还有很多其它功能和语法可以用于编写 Bash 脚本,这只是一个入门...
commandN done 例如,顺序输出当前列表中的数字: for loopin 1 2 3 4 5 do echo "The value is: $loop" done 输出结果: The value is: 1 The value is: 2 The value is: 3 The value is: 4 The value is: 5 while循环用于不断执行一系列命令,也用于从输入文件中读取数据;命令通常为测试条件。其...
(2) creates a potentially very long single line of output” 如何把用换行符“\n”分隔的一个大字符串,分割开,并存放到一个数组中? #!/bin/bash declare OUTPUT=$(sshroot@10.111.111.111isi_for_array isi_flush --dedupe-queue --dedupe-index ) ...
When you execute a command or run a script, you receive an exit code. An exit code is a system response that reports success, an error, or another condit...
for i in {0..100}; do printf '%s\n' "$i" done 循环遍历可变数字范围 替代seq。 # Loop from 0-VAR. VAR=50 for ((i=0;i<=VAR;i++)); do printf '%s\n' "$i" done 循环数组 arr=(apples oranges tomatoes) # Just elements. ...