PS E:\temp> [System.IO.Directory]::Exists('E:\temp\') True PS E:\temp> [System.IO.Directory]::Exists('E:\temp') True If you want to check if the directory the script/program is currently in contains a subdirectory, you can use the trick I demonstrate below - where I check if ...
newfile=`echo "$file" | sed "s/${OLD}/${NEW}/g"` if [ -f "$newfile" ]; then echo "ERROR: $newfile exists already" else echo "renaming $file to $newfile ..." mv "$file" "$newfile" fi fi done 这是一个复杂一些的例子。让我们详细讨论一下。第一个if表达式判断输入命令行参...
Check for file exists and not zero byte otherwise bypass step execution and log messages Check for files older than 2 minutes and sends out notification if the file still exists check for files that have offline attribute and set it them to archive Check if .txt file is empty Check if a...
一、if语句 1、单分支语句结构 if <条件表达式> then 指令 fi 例子: if [ -f file ] then echo “是一个普通文件” else echo “不是一个普通文件” exit 1 fi ###说明:如果file是一个普通文件,那么就执行echo “是一个普通文件” 否则 输出一条"不是一个普通文件" 最后退出脚本 2、多分支if语句...
if [ -f "$newfile" ]; then echo "ERROR: $newfile exists already" else echo "renaming $file to $newfile ..." mv "$file" "$newfile" fi fi done 这是一个复杂一些的例子。让我们详细讨论一下。第一个if表达式判断输入命令行参数是否小于3个 (特殊变量$# 表示包含参数的个数) 。如果输入参...
What should you check for if a command exists to get something but not to set the same thing? How can some commands that don't return output by default be made to generate output? What should you consider doing when prototyping a command that produces a large amount of output? References...
PowerShell introduced module autoloading in version 3. To take advantage of this feature, the script module must be saved in a folder with the same base name as the.psm1file. That folder must be located in one of the directories specified in the$env:PSModulePathenvironment variable. ...
All certs will be placed in this folder too. Create alias for: acme.sh=~/.acme.sh/acme.sh. Create daily cron job to check and renew the certs if needed. Cron entry example: 0 0 * * * "/home/user/.acme.sh"/acme.sh --cron --home "/home/user/.acme.sh" > /dev/null After...
I implore you to exercise restraint and not rely on the new User Shell Folders key. Just use the function SHGetFolderPath, which returns the path to whatever folder you want. From script, you can obtain these paths as follows: Set objShell = CreateObject("Shell.Application") Set objFolder ...
where {CLSID} is the actual CLSID of the object you've created. Of course, you may have multiple property sheet handlers for each folder. The actual script code used by the ATL registrar component looks like this: Copy Copy HKCR { NoRemove Folder { NoRemove Shellex { NoRemove PropertySheet...