linux：使用pstree和tree查看进程树和目录树

pstree工具可以查看进程的树型结构，tree工具可以查看目录的树形结构

1. pstree
1.1 pstree查看进程树：
qingsong@db2a:/tmp$ pstree
init-±atd
|-cron
|-db2fmcd
|-db2syscr-±db2fmp—4*[{db2fmp}]
| |-db2fmp—3*[{db2fmp}]
| |-db2sysc—13*[{db2sysc}]
| |-3*[db2syscr]
| |-db2vend
| -{db2syscr} |-dbus-daemon |-dhclient |-dockerd-+-docker-containe---7*[{docker-containe}] |-9*[{dockerd}]
|-5*[getty]
|-login—bash
|-master-±pickup
| -qmgr |-mdadm |-rpc.idmapd |-rpc.mountd |-rpc.statd |-rpcbind |-rsyslogd---3*[{rsyslogd}] |-sshd-+-sshd---sshd---bash-+-bash---command-not-fou | | |-pstree | |-sudo
| -sshd---sshd---bash |-sudo---su---bash---mysqld---27*[{mysqld}] |-systemd-logind |-systemd-udevd |-upstart-file-br |-upstart-socket- |-upstart-udev-br |-vmtoolsd---{vmtoolsd}-vmware-vmblock----4*[{vmware-vmblock-}]

1.2 pstree -p查看进程树，并打印每个进程的PID
root@db2a:~# pstree -p
init(1)-±atd(33478)
|-cron(1126)
|-db2fmcd(1385)
|-db2syscr(26240)-±db2fmp(26788)-±{db2fmp}(26789)
| | |-{db2fmp}(26790)
| | |-{db2fmp}(26791)
| | -{db2fmp}(5376) | |-db2fmp(26256)-+-{db2fmp}(26257) | | |-{db2fmp}(26258) | |-{db2fmp}(26259)
| |-db2sysc(26242)-±{db2sysc}(26243)
| | |-{db2sysc}(26244)
| | |-{db2sysc}(26245)
| | |-{db2sysc}(26246)
| | |-{db2sysc}(26247)
| | |-{db2sysc}(26251)
| | |-{db2sysc}(26253)
| | |-{db2sysc}(26254)
| | |-{db2sysc}(26770)
| | |-{db2sysc}(5377)
| | |-{db2sysc}(32555)
| | |-{db2sysc}(32558)
| | -{db2sysc}(35950) | |-db2syscr(26248) | |-db2syscr(26249) | |-db2syscr(26250) | |-db2vend(26252) |-{db2syscr}(26241)
|-dbus-daemon(674)
|-dhclient(893)
|-dockerd(976)-±docker-containe(1534)-±{docker-containe}(1535)
| | |-{docker-containe}(1536)
| | |-{docker-containe}(1537)
| | |-{docker-containe}(1538)
| | |-{docker-containe}(1539)
| | |-{docker-containe}(1540)
| | -{docker-containe}(28885) | |-{dockerd}(1427) | |-{dockerd}(1428) | |-{dockerd}(1429) | |-{dockerd}(1526) | |-{dockerd}(1527) | |-{dockerd}(1546) | |-{dockerd}(1547) | |-{dockerd}(1548) |-{dockerd}(1656)
|-getty(1076)
|-getty(1079)
|-getty(1082)
|-getty(1083)
|-getty(1085)
|-login(1387)—bash(3712)
|-master(30557)-±pickup(60705)
| -qmgr(2244) |-mdadm(30240) |-rpc.idmapd(739) |-rpc.mountd(1218) |-rpc.statd(863) |-rpcbind(857) |-rsyslogd(790)-+-{rsyslogd}(821) | |-{rsyslogd}(822) |-{rsyslogd}(823)
|-sshd(1109)-±sshd(657)—sshd(678)—bash(679)-±bash(746)—command-not-fou(747)
| | |-sudo(745)
| | -sudo(3005)---su(3006)---bash(3007)---pstree(3863) |-sshd(24325)—sshd(24345)—bash(24346)
|-sudo(7070)—su(7071)—bash(7072)—mysqld(8845)-±{mysqld}(8846)
| |-{mysqld}(8847)
| |-{mysqld}(8848)
| |-{mysqld}(8849)
| |-{mysqld}(8850)
| |-{mysqld}(8851)
| |-{mysqld}(8852)
| |-{mysqld}(8853)
| |-{mysqld}(8854)
| |-{mysqld}(8855)
| |-{mysqld}(8856)
| |-{mysqld}(8857)
| |-{mysqld}(8859)
| |-{mysqld}(8860)
| |-{mysqld}(8861)
| |-{mysqld}(8862)
| |-{mysqld}(8863)
| |-{mysqld}(8864)
| |-{mysqld}(8865)
| |-{mysqld}(8866)
| |-{mysqld}(8867)
| |-{mysqld}(8868)
| |-{mysqld}(8869)
| |-{mysqld}(8870)
| |-{mysqld}(8871)
| |-{mysqld}(8872)
| -{mysqld}(9058) |-systemd-logind(788) |-systemd-udevd(497) |-upstart-file-br(852) |-upstart-socket-(855) |-upstart-udev-br(491) |-vmtoolsd(1443)---{vmtoolsd}(3339)-vmware-vmblock-(1401)-±{vmware-vmblock-}(1404)
|-{vmware-vmblock-}(1405)
|-{vmware-vmblock-}(40323)
`-{vmware-vmblock-}(41493)

1.3 pstree -p 查看某个进程树型结构
root@db2a:~# pstree -p 26240
db2syscr(26240)-±db2fmp(26788)-±{db2fmp}(26789)
| |-{db2fmp}(26790)
| |-{db2fmp}(26791)
| -{db2fmp}(5376) |-db2fmp(26256)-+-{db2fmp}(26257) | |-{db2fmp}(26258) |-{db2fmp}(26259)
|-db2sysc(26242)-±{db2sysc}(26243)
| |-{db2sysc}(26244)
| |-{db2sysc}(26245)
| |-{db2sysc}(26246)
| |-{db2sysc}(26247)
| |-{db2sysc}(26251)
| |-{db2sysc}(26253)
| |-{db2sysc}(26254)
| |-{db2sysc}(26770)
| |-{db2sysc}(5377)
| |-{db2sysc}(32555)
| |-{db2sysc}(32558)
| -{db2sysc}(35950) |-db2syscr(26248) |-db2syscr(26249) |-db2syscr(26250) |-db2vend(26252)-{db2syscr}(26241)

2. tree
2.1 查看某个目录的目录树
root@db2a:~# tree /tmp
/tmp|-- 1
|-- 1.out|-- EXAMPLE.txt
|-- Important\ image.jpg|-- MongoDBIntro.pdf
|-- New|-- db2cktsa.log
|-- dir2| |-- MongoDBIntro.pdf| |-- latch.out| |-- latch.sh| -- mongodb.rpm |-- file6|-- fun.sh |-- image\ \ 01.jpg|-- image\ \ 02.jpg |-- log2.bak -> log2|-- lv1 | |-- dir1 | |– file3
| |-- file1
| |-- file2
| -- lost+found |-- lv2 | |-- dir1 | |– file3| |-- file1| |-- file2| -- lost+found |-- mongo.tar|-- mongo.taraa |-- test| |-- dir2.tar.gz| |-- im\ age-1.jpg| |-- mongodb.rpm|– price.sh
|-- test2| |-- dir2.tar.gz| -- price.sh |-- text.pdf|-- time_take.sh |-- timing.log|-- tmp.9Hs6fScHlN |-- tmp.LY3ZvKPd6e|-- txt | |-- c | | |-- count.c| |– sample.c
| |-- ed\ -n\ 2,5!p\ test.txt
| |-- err.txt
| |-- fileL.txt
| -- text.txt|-- uniqfiles |-- user.sh|-- variables.sh |-- vmware-root| |-- vmware-apploader-1349.log| |-- vmware-apploader-1414.log|– vmware-apploader-1443.log
`-- z

15 directories, 45 files

2.2 查看目录树，同时打印出文件大小
root@db2a:~# tree -h /tmp/txt
/tmp/txt|-- [4.0K] c
| |-- [ 0] count.c
| -- [ 0] sample.c |-- [ 12K] ed\ -n\ 2,5!p\ test.txt |-- [ 27] err.txt |-- [ 64] fileL.txt |-- [ 64] fileU.txt |-- [ 20] input.txt |-- [ 12] log.txt |-- [ 30] output.txt |-- [ 21] test.txt– [ 6] text.txt
1 directory, 11 files

另外， tree还可以生成html格式的目录树