In the daily operation of the Anqi CMS website, precise management of the system's core processes is a key factor in ensuring service stability and maintenance efficiency. Among these,stop.shScript plays a crucial role, it can accurately identify and terminate the running AnQiCMS main process.As an experienced content operation expert familiar with AnQiCMS, I know that such tools are indispensable for ensuring the smooth operation of core businesses such as content publishing and updating.
stop.shThe design purpose of the script is to provide an automated and reliable way to shut down AnQiCMS service, which is very necessary for tasks such as system maintenance, upgrades, or troubleshooting.It avoids the麻烦 and potential errors of manually searching for process IDs, ensuring the accuracy of the operation.
The core of the script's work lies in its clever process identification mechanism. It first utilizesps -efCommand to list detailed information of all running processes on the system.This command will output comprehensive data including process ID (PID), parent process ID (PPID), CPU utilization, startup time, and command line.
Next, in order to accurately filter out the AnQiCMS main process from the massive process list, the script uses two layersgrepof filtering. The first layergrep '\<anqicms\>'is the key recognition. Here,\<and\>Is a word boundary in regular expressions, they ensuregrepMatches the complete 'anqicms' word only, not other process names containing 'anqicms' as a substring (for example, namedmyanqicms_appThe process will not be mistakenly terminated). This precise matching avoids mistakenly affecting other processes on the system that may have similar names but unrelated functions, greatly enhancing the safety of the operation.
Following immediately.grep -v grepIt is a standard and necessary filtering step. SincegrepThe command itself is also a process, which appears during its execution.ps -efin the output, and its command line will include the keywords it is searching for (i.e., "anqicms"). To preventgrepthe process itself from being mistakenly identified and terminated,grep -v grepExclude all lines containing the 'grep' keyword from the results, thus obtaining a pure list that only contains the target AnQiCMS process.
Finally,awk '{printf $2}'Command, the script extracts the process ID (PID) from the process information that has been filtered through two layers.ps -efThe second field in the output format is usually the process ID,awkThe tool can accurately capture this information. If the AnQiCMS process is running,existsthe variable will store its PID; if not found,existsit will be empty.
Obtained the process ID, the script will perform a simple judgment. IfexistsThe variable is empty, indicating that the AnQiCMS process is not running, and the script will output the corresponding prompt information. On the contrary, ifexistscontains a valid PID, the script will executekill -9 $existsa command.kill -9is to sendSIGKILLSignal, this is an instruction to force the termination of a process. The target process cannot catch or ignore this signal, thus ensuring that the AnQiCMS process stops running immediately and unconditionally.This compulsion is especially effective when it is necessary to quickly shut down services to deal with emergencies.
Throughout the execution process, the script will also record the time, process name, and PID check results.echoThe command will record the operation time, process name, and PID check results.check.logIn the file, and display status information on the standard output. This log record provides valuable data for subsequent operation and maintenance auditing and problem troubleshooting.
Through this meticulous recognition logic and decisive termination mechanism,stop.shThe script provides an powerful and reliable tool for the operation and maintenance personnel of AnQiCMS, ensuring that the core services of AnQiCMS can be managed accurately and efficiently when needed.
Common Questions (FAQ)
1. If my AnQiCMS executable file is not the default one.anqicms,stop.shCan the script identify and stop it?
By default,stop.shscript, make sure it points to the correct directory of the AnQiCMS executable file, and that the directory containsBINNAMEThe variable is hardcoded asanqicmsIf your AnQiCMS executable file has been renamed (for example, to distinguish between multiple instances on the same server), you need to manually editstop.shscripts, such asBINNAME=anqicmsThis line should be modified to your actual executable file name, for exampleBINNAME=myanqicmsappSimilarly, the scriptgrep '\<anqicms\>'This section also needs to be modified accordingly to ensure accurate matching.
2. Whystop.shthe script needs to usekill -9to forcefully terminate the process instead of a more gentle onekillcommand?
kill -9is sentSIGKILLSignal, this is a signal that cannot be caught or ignored by the target process. It immediately terminates the process without giving it a chance to clean up or save data. Although this may result in the loss of unsaved data, it is particularly useful in automated scripts, especially when it is necessary to ensure that the process closes quickly and unconditionally (for example, to avoid zombie processes, to deal with unresponsive processes, etc.).kill -9is a more reliable choice because it ensures the termination of the process. For a graceful shutdown in daily use, it is usually usedkillsendSIGTERM（Default signal），gives the process a chance to clean up resources before exiting.
3. How to confirm?stop.shDid the script successfully stop the AnQiCMS process?
Runstop.shAfter the script, you can verify by executing it againps -ef | grep '\<anqicms\>' | grep -v grepcommand. If the command does not return any results, it means that the AnQiCMS process has been successfully terminated. In addition,stop.shScript will also log process check results in its execution log (default ascheck.log), where you can check the file to confirm the process status.