06262022.md

1. Kill a specific process in Windows Server:

• Searching for the PID (process ID) that has been occupied by classifying through a port number:

netstat -aon | findstr <port>

• Then kill it with taskkill command:

taskkill /F /T /PID <pid>

2. Searching for existence package in the yum repo list:

• eg: All the packages started with phrase go

su -c 'yum list go\*'

3. Extract specific field from output of tasklist in cmd:

wmic process where caption="python3.9.exe" get ProcessId
wmic logicaldisk (not really related)

4. Redirect or assign a stdout to variable in cmd:

• Solution 1:

echo dir /-D > test.txt
set /p something=<test.txt
echo %something%

• Solution 2:

for /f "tokens=* USEBACKQ" %%i in ('tasklist ^| findstr "explorer"') do set VAR=%%i

• NOTE:

• The %%i with the first % is used to escape the second one.
• Use USEBACKQ if you have a string to insert or a long file name, you can use your double quotes without screwing up the command.