echo "This script needs at least $MINPARAMS command-line arguments!" fi echo exit 0 运行代码: bash test30.sh 1 2 10 The name of this script is "test.sh". The name of this script is "test.sh". Parameter #1 is 1 Parameter #2 is 2 --- All the command-line parameters are: 1 ...
In this example, we have two variables, ‘a’ and ‘b’. The script checks if ‘a’ is equal to ‘b’. If it’s not, it moves on to the ‘elif’ statement to check if ‘a’ is greater than ‘b’. If neither condition is met, it executes the ‘else’ statement, which in t...
./my_script.sh arg1 arg2 在脚本中,你可以使用$1来代表第 1 个参数,用$2来代表第 2 个参数,以此类推。$0是一个特殊变量,它代表正在运行的脚本的名字。 现在,创建一个新的 shell 脚本,命名为arguments.sh,并向其中添加以下几行代码: #!/bin/bash echo "Script name is: $0" echo "First argument i...
/bin/bashecho"Script name is: $0"echo"First argument is: $1"echo"Second argument is: $2" 1. 2. 3. 4. 使其可执行并像这样运行它: 复制 $./argument.sh abhishek prakash Script name is:./argument.sh First argument is:abhishek Second argument is:prakash 1. 2. 3. 4. 让我们快速看一...
The following table list the condition possibilities for both the single- and the double-bracket syntax. Save a single exception, the examples are given in single-bracket syntax, but are always compatible with double brackets. 1. File-based conditions: ...
/bin/bashLINE=1whileread CURRENT_LINEdoecho"${LINE}: $CURRENT_LINE"((LINE++))done < /etc/passwd# This script loops through the file /etc/passwd line by line 退出状态码,任何一个命令执行完成后都会产生一个退出状态码,范围0-255,状态码可以用来检查...
echo "This script needs at least $MINPARAMS command-line arguments!" fi echo exit 0 算数运算符 $vim test.sh #!/bin/bash a=10 b=20 val=`expr $a + $b` echo "a + b : $val" val=`expr $a \* $b` echo "a * b : $val" ...
In larger scripts, you might need to process large amounts of data stored in arrays. For instance, you might have a script that reads lines from a file into an array and then processes each line individually. In such cases, knowing how to loop through arrays in Bash is invaluable. ...
/bin/bash># This script is a value test for 1 and 2>#2016-0828 author chawan>#>if[1-lt2];then>echo"2 is bigger">fi>EOF[root@localhost test]# chmod +x if11[root@localhost test]# ./if112is bigger 1. 2. 3. 4. 5. 6....
Root is not allowed to execute the installer script 在此示例中,命令 whoami 的输出与单词“root”进行比较。对于字符串比较 ==, !=, < 应该使用 and 对于数值比较 eq, ne,lt 和 gt 应该使用。 Bash 示例 6. 增强的括号 在上述所有示例中,我们仅使用单括号来包围条件表达式,但 bash 允许使用双括号,作...