[root@c7-server ~]#cateven_odd_if.sh#!/bin/bashif[ $# -ne1];thenecho"You must input just one argument."exit1fivar=$[$(id-u $1)%2]if[ $var -eq0];thenecho"The UID of $1 is even."elseecho"The UID of $1 is odd."fi 编写一个脚本,接收两个文件名作为参数,返回文件的行数...
#!/bin/bash if [ $# -lt 1 ];then echo "At least one argument" exit 1 fi if ! id $1 &>/dev/null;then echo "the user does not exist" exit 2 fi if id $1 &>/dev/null;then if [[ `id -u $1` -ge 500 ]] && [[ `grep 'bash$' /etc/passwd | cut -d: -f7` ]]...
/bin/bashif id zwl &> /dev/null; then echo "User zwl exists."fi[root@c7-server ~]# bash test.sh User zwl exists. 1. 2. 双分支if语句 if TEST; then CMD-TRUEelse CMD-FALSEfi 1. 2. 3. 为真执行CMD-TRUE,为假执行CMD-FALSE。 [root@c7-server ~]# cat test.sh#!/bin/bash read...
//此处将函数的执行状态结果传递给变量retval1,为了在elif判断中 不去引用if的执行状态结果, if [ $retval1 -eq 5 ];then echo "user ${1}${i} is exists" elif [ $retval1 -eq 0 ];then echo "user ${1}${i} add sucessfull" else echo "unkown error" fi done [root@localhost sh]# 注意...
Generally, if you’re starting to check if your file exists, the script content will be like this: #! /bin/bash # Use the argument expansion to capture all files provided as arguments. for FILE in ${@,} do if [[ ! -f $FILE ]] ...
The“$#”variable stores the number of input arguments passed to a script. If the script expects at least one input argument, we can check if the“$#”variable is greater than zero. Here is an example code to check if at least one input argument exists using the“$#”variable: ...
if [ -f $file ] #判断文件在当前目录是否存在。 then echo "$file exists." fi done CTRL+D /> . ./test9.sh test2.sh exists. test3.sh exists. test4.sh exists. test5.sh exists. test6.sh exists. test7.sh exists. test8.sh exists./...
Exercise 1: Write a bash shell script that checks the length of the string provided to it as an argument. If no argument is provided, it prints 'empty string'. Exercise 2: Write a shell script that checks whether a given file exists or not. You can provide the full file path as the...
location"# Notice that the space in the $location variable is ignored and the location argument accepts the entire string as the value 在JSON 字典输出中,查看已创建的资源组的属性。 使用If Then Else 确定变量是否为 null 若要评估字符串,请使用!=,要评估数字,请使用-ne。 以下 If Then Else 语句...
BashEN在使用MSBUILD 去编译msbuild文件的时候,如果这个方案或者项目的名称或者路经中间有空格符号,需要把...