The basic syntax of a Bashif-elsestatement is as follows: if [ condition ]; then # Code to be executed if the condition is true else # Code to be executed if the condition is false fi Q. How do I use the if-elif-else statement in a bash script to handle multiple conditions?
'Else if'in bash scripting, often written as'elif', is used to check multiple conditions in your code. It is used with the syntax,if [firstStatement]; then... elif [secondCondition]; then... else. It’s a powerful tool that allows your scripts to make decisions based on various scen...
The then, else if (elif), and else are clauses to the if statement. What is the syntax of a Bash If Statement? In Bash, the if statement is part of the conditional constructs of the programming language. The if in a Bash script is a shell keyword that is used to test conditions ...
if 先来个实例： x=5; if [ $x = 5 ]; then echo 'x equals 5.'; else echo ...
We can easily understand the syntax of a bash ‘if statement’ as with a normal programming language. The only difference is that we should use the ‘fi’ keyword to indicate the end of the conditionals. So, let’s try the following bash script. #!/bin/bash echo if then else ...
问if...then语句的分组命令，包括在一行中为shell/bash分配变量ENbash中的变量 <span style="display:...
而if [ ! -z err]||[!−eapk ]; then 没问题; 整数比较 : -eq 等于,如:if [ "a"−eq"b" ] -ne 不等于,如:if [ "a"−ne"b" ] -gt 大于,如:if [ "a"−gt"b" ] -ge 大于等于,如:if [ "a"−ge"b" ] -lt 小于,如:if [ "a"−lt"b" ] ...
if [ $name ] echo “Hello $name” else echo “Must’ve been my imagination” fi In the terminal: ~$bash name.sh Who is there? ~$ Must’ve been my imagination How to create a backup management script in Bash Other items to consider include setting up backup management scripts. This ...
Here, we list some basic bash syntax with a brief explanation. It is a good starting point if you are a beginner.
{GREEN}这是正常信息${NC}" echo -e "${YELLOW}这是警告信息${NC}" echo -e "${BLUE}这是重要信息${NC}" # 更复杂的示例:根据命令输出高亮显示 output=$(ls -l /nonexistent_directory) if [ $? -eq 0 ]; then echo -e "${GREEN}${output}${NC}" else echo -e "${RED}${output}$...