if-statement-bash-scripting-example Nested if Statement If 语句和 else 语句可以嵌套在 bash 脚本中。关键字 fi 显示了内部 if 语句的结束,所有 if 语句都应该以关键字 fi 结束。 Syntax : if [ condition_command ] then command1 command2 …….. last_command else if [ condition_command2 ] then c...
Bash scripting is a powerful tool for automating tasks in the Linux environment. One of the key elements of any programming or scripting language is conditional logic, and in Bash, this is achieved through if statements. In a bash script,if statementchecks whether a condition is true or not....
if-statement-bash-scripting-example Nested if Statement If 语句和 else 语句可以嵌套在 bash 脚本中。
Example 7: If Else Statement in Bash Scripting General Syntax of Bash IF ELIF ELSE Below is the general syntax of IF ELIF and ELSE in bash: if CONDITION-TO-TEST; then CODE-TO-EXECUTE-1 elif NEXT-CONDITION-TO-TEST; then CODE-TO-EXECUTE-2 elif NEXT-CONDITION-TO-TEST; then CODE-TO-EXE...
bash printf 格式 - Shell-Bash (1) Bash Negate If In bash scripting, the "if" statement is used to evaluate a condition and perform certain actions based on whether the condition is true or false. Sometimes, you may need to negate the condition, i.e., perform actions when the condition...
'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...
Conditions in bash scripting (if statements) - Linux Academy Blog https://linuxacademy.com/blog/linux/conditions-in-bash-scripting-if-statements/ Table of conditions The following table list the condition possibilities for both the single- and the double-bracket syntax. Save a single exception, th...
In Bash scripting, the exit status of a command or script is an important piece of information that can determine the success or failure of a script or a particular command. A command or script’s exit status, which is a numeric value, shows whether it was successful or encountered an ...
以下是一些Bash 4+示例: 示例1,在字符串中检查是否存在'yes'(不区分大小写): if [[ "${str,,}" == *"yes"* ]] ;then 示例2,检查字符串中是否包含“yes”(不区分大小写): if [[ "$(echo "$str" | tr '[:upper:]' '[:lower:]')" == *"yes"* ]] ;then 示例三,检查字符串中是...
else echo “Wrong insertion !” fi string.sh #! /bin/bash word=a if [[ $word == "b" ]] then echo "condition b is true" elif [[ $word == "a" ]] then echo "condition a is true" else echo "condition is false" fi