Example 9: How to Create a File in Multiple Servers using Bash For Loop in Linux You can create a file in multiple servers using bash for loop in a single line as shown below. In this example, we are creating a
Bash for Loop With a Shell Variable In addition to an array, you can use a shell variable to store an item for bash loops. Here’s the code syntax: #Define the shell variable variable="a single item" #Iterate through the variable and apply the operations for item in $variable do comma...
在诸如Bash之类的脚本语言中,循环对于自动执行重复性任务非常有用。在Bash脚本中有3个基本的循环结构,for循环,while循环,until循环。 本教程解释了Bash中while循环的基础知识,以及用于改变循环流的break和continue语句。 Bash while 循环 只要给定条件的计算结果为true,while循环就会使用一组给定的命令执行未知次数。 Bash...
The loop structure is one of the key components of every programming language including Bash. They are used to repeat the specified instructions against a condition. Frequently employed loop structures in Bash scripting arefor,while, anddo-while. In Bash scripting, thewhileloop functions by repeatin...
foriin{1..5};doecho$i;done# Output:# 1# 2# 3# 4# 5 Bash Copy In this example, we’ve created a ‘for’ loop that acts as a ‘foreach’ loop. The loop iterates over the numbers 1 through 5, echoing each number on a new line. This is a basic way to use the ‘foreach...
for n in a b c d e do while true do if [ $RANDOM -gt 20000 ] then printf . break 2 ## break out of both while and for loops elif [ $RANDOM -lt 10000 ] then printf '"' break ## break out of the while loop fi done done echo 继续 在循环内部, continue命令通过传递任何剩余...
for i in {0..100}; do printf '%s\n' "$i" done 1. 2. 3. 4. 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' "$i" done 1. 2. 3. 4. 5. 循环数组 arr=(apples oranges tomatoes) ...
for i in {0..100}; do printf '%s\n' "$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. ...
Running for loop from bash shell command line: $ for f in $( ls /var/ ); do echo $f; done 1. 2. 3. 4. 5. 6. 7. 8. 12.2. Bash while loop #!/bin/bashCOUNT=6 # bash while loop while [ $COUNT -gt 0 ]; do echo Value of count is: $COUNT ...
追加只是意味着将文本添加到文件的末尾或底部。 使用>>运算符附加文本 >>操作者输出重定向到一个文件，...