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 file test.txt in server1 and server2 by looping through each server and...
IFS=$SAVEIFS # Restore IFS for ((j=0;j<4;j+=1)); do printf "Current is line: $j. \n" printf "%s \n" "${names[$j]}" done 参考资料 === https://linuxconfig.org/bash-printf-syntax-basics-with-examples https://linuxhint.com/bash_loop_list_strings/ https://www.shellhacks....
the loop will search all the partitions under the disk “/dev/sda” and print all of it. for i in / dev / sda *; do echo "$i" done One line for loop With the basics covered, we can now compress for loops into a single line. ...
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命令,立即开始循环的新迭代: for n in {1..9} ## See Brace expansion in Chapter 4 d...
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 $variable do comma...
foriin{1..5};doecho$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...
In this script, the ‘for’ loop iterates over the numbers 1 through 10. For each iteration, the ‘if-elif-else’ statement checks if the current number is equal to 5 or 7 and prints a message accordingly. ‘Else If’ with Functions ...
While ShellCheck is mostly intended for interactive use, it can easily be added to builds or test suites. It makes canonical use of exit codes, so you can just add ashellcheckcommand as part of the process. For example, in a Makefile: ...
# Loop from 0-VAR. VAR=50 for ((i=0;i<=VAR;i++)); do printf '%s\n' "$i" done 1. 2. 3. 4. 5. 循环数组 arr=(apples oranges tomatoes) # Just elements. for element in "${arr[@]}"; do printf '%s\n' "$element" ...
for i in {0..100}; do printf '%s\n' "$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. ...