ENOENTENOENT — No Such File or Directory
The specified file or directory does not exist in the filesystem.
ESRCHNo process matching the specified process ID was found.
The process ID passed to kill() or another signal-related call does not correspond to any running process. The target process may have already exited or the PID may be incorrect.
Verify the process is still running using ps or pgrep before sending signals. Handle this error gracefully in scripts by checking the exit status of kill.
ENOENTThe specified file or directory does not exist in the filesystem.
EILSEQAn invalid multibyte or wide character sequence was encountered during character conversion.
EIOA physical or low-level I/O error occurred during a read or write operation.
ECONNRESETThe remote host forcibly closed the connection by sending a TCP RST packet.
EACCESThe requested access to a file or resource is not allowed by the file permissions.
EPROTOTYPEThe protocol type is wrong for the socket being used.