root@sunland2:~> pstree -p
init(1)-+-agetty(7993)
        |-agetty(7994)
        |-agetty(7995)
        |-agetty(7996)
        |-agetty(7997)
        |-agetty(7998)
        |-asterisk(30506)---asterisk(30507)-+-asterisk(30509)
        |                                   |-asterisk(30510)
        |                                   |-asterisk(30511)---mpg123(31821)---mpg123(31822)
        |                                   |-asterisk(30512)
        |                                   |-asterisk(30513)
        |                                   |-asterisk(30515)
        |                                   |-asterisk(30516)
        |                                   |-asterisk(30517)
        |                                   |-asterisk(30518)
        |                                   |-asterisk(30520)
        |                                   |-asterisk(30521)
        |                                   |-asterisk(30522)
        |                                   |-asterisk(30523)
        |                                   |-asterisk(30524)
        |                                   |-asterisk(30527)
        |                                   |-asterisk(31861)
        |                                   |-asterisk(32013)
        |                                   |-asterisk(32125)
        |                                   |-asterisk(32208)
        |                                   |-asterisk(32276)
        |                                   |-asterisk(32373)
        |                                   |-asterisk(32398)
        |                                   |-asterisk(32443)
        |                                   |-asterisk(32456)
        |                                   |-asterisk(32482)
        |                                   |-asterisk(32516)
        |                                   |-asterisk(32574)
        |                                   |-asterisk(32657)
        |                                   |-asterisk(32677)
        |                                   |-asterisk(32681)
        |                                   |-asterisk(32688)
        |                                   |-asterisk(32749)
        |                                   `-asterisk(32751)