ps的用法简介
ps这个工具也是博大精深，各工具的详情请查看man和参考网络文章。
-A Select all processes. Identical to -e. a Lift the BSD-style "only yourself" restriction, which is imposed upon the set of all processes when some BSD-style (without "-") options are used or when the ps personality setting is BSD-like. The set of processes selected in this manner is in addition to the set of processes selected by other means. An alternate description is that this option causes ps to list all processes with a terminal (tty), or to list all processes when used together with the x option -e Select all processes. Identical to -A. x Lift the BSD-style "must have a tty" restriction, which is imposed upon the set of all processes when some BSD-style (without "-") options are used or when the ps personality setting is BSD-like. The set of processes selected in this manner is in addition to the set of processes selected by other means. An alternate description is that this option causes ps to list all processes owned by you (same EUID as ps), or to list all processes when used together with the a option. u display user-oriented format f ASCII-art process hierarchy (forest) 常用 1）ps -ef 2）ps auxf 3）指定输出的列，查找状态为D的进程 [Jack@test1 ~]$ ps -eo pid,stat,wchan,args |grep D |grep -v grep |wc -l 19 [Jack@test1 ~]$ ps -eo pid,stat,wchan,args |grep D |grep -v grep PID STAT WCHAN COMMAND 2679 D lookup df 2998 D lookup df 3878 D lookup df 7776 D lookup df -h 8761 D lookup df -h 9285 D lookup df -h 9977 D vfs_re bash 10163 D lookup umount -lf /home/web/upload/phonerecord/2012 10672 D lookup fuser -m -v /home/web/upload/phonerecord/2012 12806 D lookup ls --color=tty /home/web/upload/phonerecord/ 14184 D nfs4_h ls --color=tty /home/web/upload/phonerecord/2012 14507 D lookup /sbin/mount.nfs 192.168.5.75:/home/phonerecord/2012 /home/web/upload/phonerecord/2012 -o rw 17947 D lookup df -h 18195 D lookup umount /home/web/upload/phonerecord/2012 19069 D lookup /sbin/mount.nfs 192.168.5.75:/home/phonerecord/2012 /home/web/upload/phonerecord/2012 -v -o rw 21375 D lookup df -vh 24728 D lookup df -H 28849 D lookup ls --color=tty 29396 D lookup df -i
