file_path=/var/scripts/migratedb.sh if [ -e "$file_path" ]; then echo "The file exists." else echo "The file does not exist." fi If-elif-else Statement 在bash 脚本中,如果希望使用 if 语句应用多个条件,则使用 if elif else。在这种类型的条件语句中,如果满足第一个条件,则执行下面的代码...
[ FILE1 -nt FILE2 ] 如果 FILE1 has been changed more recently than FILE2, or 如果 FILE1 exists and FILE2 does not则为真。 [ FILE1 -ot FILE2 ] 如果 FILE1 比 FILE2 要老, 或者 FILE2 存在且 FILE1 不存在则为真。 [ FILE1 -ef FILE2 ] 如果 FILE1 和 FILE2 指向相同的设备和节...
thenecho"file exit";fifileexit[0][jd_sunhui@login1SHELL]$if[-ftest.jpg];thenecho"file exis...
-b file True if file exists and is a block special file. -c file True if file exists and is a character special file. -d file True if file exists and is a directory. -e file True if file exists. (Not avail- able in sh.) -f file True if file exists and is a regular file....
If File exists then copy it script powershell If is not recognized as the name of a cmdlet? if not contains If statement based on day of the week evaluating despite being false If Test-Connection do these action else exit. If variable is null or empty skip in script If with multiple ...
id$UserName&>/dev/null&&useradd$UserName||echo"$UserNameexists."#如果用户存在,则 && 前的部分为假,那么需要判断&& 后面的部分;#如果用户不存在,则 &&前面的部分为真,那么不需要判断&& 后面的部分#对于 || 运算来说,如果用户不存在,则前半部分都为假,则需要运行 || 后面的部分...
myFile="/var /log/httpd/access.log" #这里的-x 参数判断$myPath是否存在并且是否具有可执行权限 if [ ! -x "$myPath"]; then mkdir "$myPath" fi #这里的-d 参数判断$myPath是否存在 if [ ! -d "$myPath"]; then mkdir "$myPath" ...
In a script, you would typically use it in an if statement. To negate and check if the folder or file doesnotexist, use either "!" or "-not", and remember to enclose the Test-Path statement in parentheses. Also remember that if the path or folder name contains a space, you need to...
Powershell是一种跨平台的脚本语言和命令行工具,用于自动化任务和管理操作系统。它结合了命令行的灵活性和脚本语言的功能,可以在Windows、Linux和macOS等操作系统上运行。 在Pow...
Check if file exists then delete it- fix code Check if installed SQL Server is an Eval copy Check if login has db_owner via user mappings on a specific database Check if objects already exist (i.e. FILEGROUP and FILE). check if schema exists Check if UNC path exists (It is folder,...