Bash Script – Check If File is Empty or Not With the -s Option touch/tmp/f1echo"data">/tmp/f2ls-l /tmp/f{1,2} [ -s /tmp/f1 ]echo$?# output is 1[ -s /tmp/f2 ]echo$?# out put is 0# -s FILE FILE exists and has a size greater than zerohttps://www.computerhope.com...
A shell script (isEmpty.sh) example to check if a file is empty or not. The text file afile.txt The output when the file has data The output when the file is empty. The run the script.
-s FILE FILE exists and has a size greater than zero 如果文件存在且文件大小大于零,则返回真 -e FILE FILE exists 如果文件存在,则返回真 在shell中通过test指令测试文件是否为空的示例脚本如下: #! /bin/sh if test -s file.txt; then echo "hi" else echo "empty" fi 在shell中,test指令还有另外...
= "0" && echo "Error: You must be root to run this script." && exit 1 # Check parameter. if $# -gt 1 ; then echo "Usage: ./github_pelican_nginx.sh \"commit_comments\"" && exit 1 fi # Run command functions. function ERROR() { echo >/dev/null && echo "$(date +%H:%M:...
echo "Directory is not empty" fi Let’s break it down: wc-l– counts the number of lines in the output string, which in this case is the number of items in the directory -eq 0– does an equality check to compare if the number of items found is equal to0 ...
check for files that have offline attribute and set it them to archive Check if .txt file is empty Check if a process is running check if a process or service is hanging/not responding? Check if a text file is blank in powershell check if computer exist in ou Check if drive exists, ...
將api-ms-win-core-file-l1-2-2.dll 取代為 FindFirstStreamW 和 FindNextStreamW API Kernell32.dll (#10680) (感謝 @iSazonov!) 調整協助將指令碼格式化,以使其更能容忍 StrictMode (#10563) 將-SecurityDescriptorSDDL 參數新增至 New-Service (#10483) (感謝 @kvprasoon!) ...
if[!-s ${REMOTE_FILE}]then SH_error_msg"${REMOTE_FILE} file is empty"return1fi 循环 For for循环的一般格式为: 代码语言:javascript 复制 for变量in列表docommand1 command2...commandN done 列表 是一组值(数字,字符串等)组成的序列,每个值通过空格分隔。每循环一次,就将列表中的下一个赋给变量。
01 Trap { 02 # Handle the error 03 Continue 04 } 05 06 Function MyFunction { 07 Trap { 08 # Log error to a file 09 If ($condition) { 10 Continue 11 } Else { 12 Break 13 } 14 } 15 Get-WmiObject Win32_Service –comp "Server2" –ea "Stop" 16 Get-Process 17 } 18 19 My...
01 Trap { 02 # Log error to a file 03 Continue 04 } 05 Get-WmiObject Win32_Service –comp "Server2" –ea "Stop" 06 Get-Process If an exception occurs on line 5, the trap on line 1 will execute. The trap ends with Continue, so execution will resume on line 6. Now consider ...