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1 利用pgrep 匹配名字 复制代码 代码如下: if test $( pgrep -f $1 | wc -l ) -eq 0 then echo "进程不存在" else echo "存在进程" fi 以下是补充内容： 当前系统中的进程： apple@ubuntu:~$ ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 13:57 ? 00:00:02 /sbin/init root 2 0 0 13:57 ? 00:00:00 [kthreadd] root 3 2 0 13:57 ? 00:00:00 [migration/0] root 4 2 0 13:57 ? 00:00:00 [ksoftirqd/0] root 5 2 0 13:57 ? 00:00:00 [watchdog/0] root 6 2 0 13:57 ? 00:00:00 [migration/1] root 7 2 0 13:57 ? 00:00:00 [ksoftirqd/1] root 8 2 0 13:57 ? 00:00:00 [watchdog/1] root 9 2 0 13:57 ? 00:00:00 [events/0] root 10 2 0 13:57 ? 00:00:00 [events/1] root 11 2 0 13:57 ? 00:00:00 [khelper] root 12 2 0 13:57 ? 00:00:00 [kstop/0] root 13 2 0 13:57 ? 00:00:00 [kstop/1] root 14 2 0 13:57 ? 00:00:00 [kintegrityd/0] root 15 2 0 13:57 ? 00:00:00 [kintegrityd/1] root 16 2 0 13:57 ? 00:00:00 [kblockd/0] root 17 2 0 13:57 ? 00:00:00 [kblockd/1] root 18 2 0 13:57 ? 00:00:00 [kacpid] root 19 2 0 13:57 ? 00:00:00 [kacpi_notify] root 20 2 0 13:57 ? 00:00:00 [cqueue] root 21 2 0 13:57 ? 00:00:00 [ata/0] root 22 2 0 13:57 ? 00:00:00 [ata/1] root 23 2 0 13:57 ? 00:00:00 [ata_aux] root 24 2 0 13:57 ? 00:00:00 [ksuspend_usbd] root 25 2 0 13:57 ? 00:00:00 [khubd] root 26 2 0 13:57 ? 00:00:00 [kseriod] root 27 2 0 13:57 ? 00:00:00 [kmmcd] root 28 2 0 13:57 ? 00:00:00 [btaddconn] root 29 2 0 13:57 ? 00:00:00 [btdelconn] root 30 2 0 13:57 ? 00:00:00 [pdflush] root 31 2 0 13:57 ? 00:00:00 [pdflush] root 32 2 0 13:57 ? 00:00:00 [kswapd0] root 33 2 0 13:57 ? 00:00:00 [aio/0] root 34 2 0 13:57 ? 00:00:00 [aio/1] root 35 2 0 13:57 ? 00:00:00 [ecryptfs-kthrea] root 38 2 0 13:57 ? 00:00:00 [pciehpd] root 39 2 0 13:57 ? 00:00:00 [scsi_eh_0] root 40 2 0 13:57 ? 00:00:00 [scsi_eh_1] root 41 2 0 13:57 ? 00:00:00 [kstriped] root 42 2 0 13:57 ? 00:00:00 [kmpathd/0] root 43 2 0 13:57 ? 00:00:00 [kmpathd/1] root 44 2 0 13:57 ? 00:00:00 [kmpath_handlerd] root 45 2 0 13:57 ? 00:00:00 [ksnapd] root 46 2 0 13:57 ? 00:00:00 [kondemand/0] root 47 2 0 13:57 ? 00:00:00 [kondemand/1] root 48 2 0 13:57 ? 00:00:00 [krfcommd] root 256 2 0 13:57 ? 00:00:00 [mpt_poll_0] root 717 2 0 13:57 ? 00:00:00 [scsi_eh_2] root 753 2 0 13:57 ? 00:00:00 [kdmflush] root 764 2 0 13:57 ? 00:00:00 [kdmflush] root 795 2 0 13:57 ? 00:00:00 [kjournald] root 915 1 0 13:57 ? 00:00:00 /sbin/udevd --daemon root 1617 2 0 13:57 ? 00:00:00 [kpsmoused] root 2166 1 0 13:57 tty4 00:00:00 /sbin/getty 38400 tty4 root 2167 1 0 13:57 tty5 00:00:00 /sbin/getty 38400 tty5 root 2172 1 0 13:57 tty2 00:00:00 /sbin/getty 38400 tty2 root 2173 1 0 13:57 tty3 00:00:00 /sbin/getty 38400 tty3 root 2174 1 0 13:57 tty6 00:00:00 /sbin/getty 38400 tty6 root 2244 1 0 13:57 ? 00:00:00 /usr/sbin/acpid -c /etc/acpi/eve root 2259 1 0 13:57 ? 00:00:00 /usr/sbin/syslog-ng -p /var/run/ 105 2279 1 0 13:57 ? 00:00:00 /bin/dbus-daemon --system root 2311 1 0 13:58 ? 00:00:00 /usr/sbin/incrond -f /etc/incron root 2381 1 0 13:58 ? 00:00:00 dhclient3 -e IF_METRIC=100 -pf / root 2442 1 0 13:58 ? 00:00:00 /usr/sbin/sshd root 2453 1 0 13:58 ? 00:00:00 /usr/lib/postfix/master postfix 2465 2453 0 13:58 ? 00:00:00 pickup -l -t fifo -u -c postfix 2468 2453 0 13:58 ? 00:00:00 qmgr -l -t fifo -u 108 2472 1 0 13:58 ? 00:00:00 /usr/sbin/hald root 2475 1 0 13:58 ? 00:00:00 /usr/sbin/console-kit-daemon root 2538 2472 0 13:58 ? 00:00:00 hald-runner root 2567 2538 0 13:58 ? 00:00:00 hald-addon-input: Listening on / root 2594 2538 0 13:58 ? 00:00:00 hald-addon-storage: polling /dev root 2595 2538 0 13:58 ? 00:00:00 hald-addon-storage: no polling o 108 2600 2538 0 13:58 ? 00:00:00 hald-addon-acpi: listening on ac daemon 2647 1 0 13:58 ? 00:00:00 /usr/sbin/atd root 2672 1 0 13:58 ? 00:00:00 /usr/sbin/cron root 2691 1 0 13:58 tty1 00:00:00 /sbin/getty 38400 tty1 root 2994 2442 0 14:11 ? 00:00:00 sshd: apple [priv] apple 3003 2994 0 14:11 ? 00:00:00 sshd: apple@pts/0 apple 3004 3003 1 14:11 pts/0 00:00:00 -bash apple 3024 3004 0 14:11 pts/0 00:00:00 ps -ef apple@ubuntu:~$ 1.ps -p ps -p 根据给定的pid参数判断是否有这个进程，如果有这个进程正常退出，退出值0.如果没有这个进程异常退出，退出值1. 例如： apple@ubuntu:~$ ps -p 2442 PID TTY TIME CMD 2442 ? 00:00:00 sshd apple@ubuntu:~$ echo $? 0 apple@ubuntu:~$ ps -p 1234 PID TTY TIME CMD apple@ubuntu:~$ echo $? 1 apple@ubuntu:~$ 2.pgrep pgrep根据给出的进程名判断是否有这个名字的进程。如果有这个名字的进程正常退出，退出值0.如果没有这个名字的进程异常退出，退出值1. 例如： apple@ubuntu:~$ pgrep sshd 2442 2994 3003 apple@ubuntu:~$ echo $? 0 apple@ubuntu:~$ pgrep sshddd apple@ubuntu:~$ echo $? 1 apple@ubuntu:~$ 3./proc 每个进程都会在/proc下有一个以进程PID命名的目录。 例如： apple@ubuntu:~$ ls /proc/2442 ls: cannot read symbolic link /proc/2442/cwd: Permission denied ls: cannot read symbolic link /proc/2442/root: Permission denied ls: cannot read symbolic link /proc/2442/exe: Permission denied attr clear_refs cpuset exe io loginuid mountinfo net pagemap sched smaps status wchan auxv cmdline cwd fd latency maps mounts oom_adj personality schedstat stat syscall cgroup coredump_filter environ fdinfo limits mem mountstats oom_score root sessionid statm task apple@ubuntu:~$ 可以根据上面的事实，编写bash脚本判断一个进程是否存在。下面以第3个事实，编写脚本。其他的脚本类似。 复制代码 代码如下: #!/bin/bash if [ -z $1 ] then echo "Need a pid argument" exit 1 fi if [ -d /proc/$1 ];then exit 0 else exit 1 fi |
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