The KILL command in Linux

I. Definition

the kill command is used to remove a program or work from execution. Kill to send the specified information to the program. The preset information is sigterm (15), which terminates the specified program. If you still cannot terminate the program, you can use the Sigkill (9) information to try to force the removal of the program. The program or work number can be viewed using the PS or job command

two. Syntax

Kill Options Parameters

Options

-A: When the current process is processed, the correspondence between the command name and the process number is not restricted;-L < information number;: If no < information number > option, the-l parameter lists all information names;-p: Specify Kill The command prints only the process number of the relevant process without sending any signal;-s < information name or number >: Specify the information to send;-u: Specify the user.

Parameters

Process or job identification number: Specifies the process or job to delete

three. Examplekill-l List all signal names

Kill-L1) SIGHUP2) SIGINT3) Sigquit4) Sigill5) SIGTRAP6) SIGABRT7) Sigbus8) SIGFPE9) SIGKILLTen) SIGUSR1 One) SIGSEGV A) SIGUSR2 -) Sigpipe -) SIGALRM the) SIGTERM -) Sigstkflt -) SIGCHLD -) Sigcont +) SIGSTOP -) SIGTSTP +) Sigttin A) Sigttou at) Sigurg -) Sigxcpu -) Sigxfsz -) SIGVTALRM -) sigprof -) Sigwinch in) SIGIO -) SIGPWR to) Sigsys the) Sigrtmin *) sigrtmin+1   $) sigrtmin+2  Panax Notoginseng) sigrtmin+3   -) sigrtmin+4 the) sigrtmin+5   +) sigrtmin+6   A) sigrtmin+7   the) sigrtmin+8 +) sigrtmin+9   -) sigrtmin+Ten  $) sigrtmin+ One  $) sigrtmin+ A -) sigrtmin+ -  -) sigrtmin+ -  the) sigrtmin+ the  -) sigrtmax- -Wuyi) sigrtmax- -  the) sigrtmax- A  -) sigrtmax- One  Wu) sigrtmax-Ten -) sigrtmax-9   About) sigrtmax-8   $) sigrtmax-7   -) sigrtmax-6 -) sigrtmax-5   -) sigrtmax-4   A) sigrtmax-3   +) sigrtmax-2 the) sigrtmax-1   -) Sigrtmax

the usual signals

Only the 9th signal (SIGKILL) can terminate the process unconditionally, other signal processes have the right to ignore

HUP     1     terminal disconnection int     2    interrupt (with Ctrl + C) quit    3    exit (same as Ctrl + \)   term     end Kill    9     Force termination cont        (in contrast to stop, fg/BG command)   stopis    paused (with Ctrl + Z)

force the Tomcat process to be killed

First use PS-EF to find the process ID (PID) of Tomcat, and then use the kill-9 process number, force termination

Ps-ef | grep TomcatRoot12280     1  0Aug05?xx: .: -/usr/local/jdk1.8.0_65/bin/java-djava.util.logging.config.file=/usr/local/apache-tomcat-6.0.Panax Notoginseng/conf/logging.properties-djava.util.logging.manager=org.apache.juli.classloaderlogmanager-djava.endorsed.dirs= /usr/local/apache-tomcat-6.0.Panax Notoginseng/endorsed-classpath/usr/local/apache-tomcat-6.0.Panax Notoginseng/bin/bootstrap.jar-dcatalina.base=/usr/local/apache-tomcat-6.0.Panax Notoginseng-dcatalina.home=/usr/local/apache-tomcat-6.0.Panax Notoginseng-djava.io.tmpdir=/usr/local/apache-tomcat-6.0.Panax Notoginseng/temp Org.apache.catalina.startup.Bootstrap startroot17096 17008  0  at: -pts/0    xx:xx:xx grepTomcatkill-9 12280Kill-9 12280-bash:Kill: (12280)-No Such process

Reference Articles

Http://man.linuxde.net/kill

The KILL command in Linux