从小到大列出文件/目录大小------du -a | sort -n
雍兴修
linux究竟是方便， 所想即所得， 想什么就能得到什么。 很多时候， linux中文件太多， 需要删除一些， 腾出一些空间， 那先从小到大列出文件/目录吧：
taoge@localhost ~> du -a | sort -n
0 ./b.cpp
0 ./cmd/a.txt
0 ./Desktop/a.txt
0 ./Desktop/test/a.txt
0 ./Desktop/test/b.txt
0 ./.gconf/apps/brasero/%gconf.xml
0 ./.gconf/apps/%gconf.xml
0 ./.gconf/apps/gedit-2/%gconf.xml
0 ./.gconf/apps/gedit-2/preferences/%gconf.xml
0 ./.gconf/apps/gedit-2/preferences/ui/%gconf.xml
0 ./.gconf/apps/gnome-terminal/%gconf.xml
0 ./.gconf/apps/gnome-terminal/profiles/%gconf.xml
0 ./.gconf/apps/nautilus/desktop-metadata/%gconf.xml
0 ./.gconf/apps/nautilus/%gconf.xml
0 ./.gconf/apps/panel/applets/clock/%gconf.xml
0 ./.gconf/apps/panel/applets/%gconf.xml
0 ./.gconf/apps/panel/applets/window_list/%gconf.xml
0 ./.gconf/apps/panel/applets/workspace_switcher/%gconf.xml
0 ./.gconf/apps/panel/%gconf.xml
0 ./.gconf/desktop/%gconf.xml
0 ./.gconf/desktop/gnome/accessibility/%gconf.xml
0 ./.gconf/desktop/gnome/%gconf.xml
0 ./.gconf/desktop/gnome/peripherals/%gconf.xml
0 ./.gconf/desktop/gnome/peripherals/keyboard/%gconf.xml
0 ./.gnupg/pubring.gpg
0 ./.gnupg/secring.gpg
0 ./.local/share/.converted-launchers
0 ./.local/share/Trash/files/test.2.html
0 ./.local/share/Trash/files/test.c
0 ./.local/share/Trash/files/test.html
0 ./.pulse/205d7fca86a0af0c45d758ee00000024-runtime
0 ./.RecycleBin/a.txt__DelTime:Sat_May__9_22:16:13_PDT_2015
0 ./.RecycleBin/a.txt__DelTime:Sat_May__9_22:16:38_PDT_2015
0 ./.RecycleBin/a.txt__DelTime:Sat_May__9_22:23:36_PDT_2015
4 ./a.txt
4 ./.bash_logout
4 ./.bash_profile
4 ./.bashrc
4 ./bin/delete
4 ./.cache/gedit/gedit-metadata.xml
4 ./client.c
4 ./cmd/a.txt.haha
4 ./.config/gnome-disk-utility/ata-smart-ignore
4 ./.config/gnome-session/saved-session
4 ./.config/user-dirs.dirs
4 ./.config/user-dirs.locale
4 ./c.sh
4 ./.dbus/session-bus/205d7fca86a0af0c45d758ee00000024-0
4 ./Desktop/a.c
4 ./Desktop/b.c
4 ./Desktop/c.sh
4 ./Desktop/learn_file/a.out
4 ./Desktop/learn_file/libtest.a
4 ./Desktop/learn_file/libtest.so
4 ./Desktop/learn_file/main.c
4 ./Desktop/learn_file/main.o
4 ./Desktop/learn_file/test.c
4 ./Desktop/learn_file/test.h
4 ./Desktop/learn_file/test.o
4 ./Desktop/learn_ldd/libtest.a
4 ./Desktop/learn_ldd/libtest.so
4 ./Desktop/learn_ldd/main.c
4 ./Desktop/learn_ldd/test.c
4 ./Desktop/learn_ldd/test.h
4 ./Desktop/learn_ldd/test.o
4 ./Desktop/learnMakeFile/input.c
4 ./Desktop/learnMakeFile/input.h
4 ./Desktop/learnMakeFile/input.o
4 ./Desktop/learnMakeFile/main.c
4 ./Desktop/learnMakeFile/main.o
4 ./Desktop/learnMakeFile/makefile
4 ./Desktop/learnMakeFile/mymakefile
4 ./Desktop/learnMakeFile/output.c
4 ./Desktop/learnMakeFile/output.h
4 ./Desktop/learnMakeFile/output.o
4 ./Desktop/learnMakeFile/process.c
4 ./Desktop/learnMakeFile/process.h
4 ./Desktop/learnMakeFile/process.o
4 ./Desktop/learn_nm/main.c
4 ./Desktop/learn_objdump/main.c
4 ./Desktop/learn_objdump/main.o
4 ./Desktop/learn_readelf/main.c
4 ./Desktop/learn_reg/a.txt
4 ./Desktop/learn_shell/a.sh
4 ./Desktop/learn_strings/test.c
4 ./Desktop/learn_strings/test.h
4 ./Desktop/learn_strip/a.out
4 ./Desktop/learn_strip/main.c
4 ./Desktop/main.c
4 ./Desktop/reg/test.txt
4 ./Desktop/server.c
4 ./Desktop/sql/taoge.db
4 ./Desktop/test.c
4 ./Desktop/test/tree-1.7.0/doc/xml.dtd
4 ./Desktop/test/tree-1.7.0/hash.c
4 ./Desktop/test/tree-1.7.0/INSTALL
4 ./Desktop/test/tree-1.7.0/Makefile
4 ./Desktop/test/tree-1.7.0/TODO
4 ./Desktop/test.txt
4 ./Desktop/tmp/input.c
4 ./Desktop/tmp/input.h
4 ./Desktop/tmp/main.c
4 ./Desktop/tmp/output.c
4 ./Desktop/tmp/output.h
4 ./Desktop/tmp/process.c
4 ./Desktop/tmp/process.h
4 ./Desktop/tree-1.7.0/doc/xml.dtd
4 ./Desktop/tree-1.7.0/hash.c
4 ./Desktop/tree-1.7.0/INSTALL
4 ./Desktop/tree-1.7.0/Makefile
4 ./Desktop/tree-1.7.0/TODO
4 ./Documents
4 ./Downloads
4 ./.esd_auth
4 ./.gconf/apps/brasero/config/%gconf.xml
4 ./.gconf/apps/brasero/config/priority/%gconf.xml
4 ./.gconf/apps/gedit-2/preferences/ui/statusbar/%gconf.xml
4 ./.gconf/apps/gnome-terminal/profiles/Default/%gconf.xml
4 ./.gconf/apps/gnote/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/2@46@1@32@GB@32@Filesystem@46@volume/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/8@46@0@32@GB@32@Filesystem@46@volume/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/CDROM@46@volume/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/computer/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/directory/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/home/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/RHEL_6@46@0@32@i386@32@Disc@32@1@46@volume/%gconf.xml
4 ./.gconf/apps/nautilus/desktop-metadata/trash/%gconf.xml
4 ./.gconf/apps/nm-applet/%gconf.xml
4 ./.gconf/apps/panel/applets/clock/prefs/%gconf.xml
4 ./.gconf/apps/panel/applets/window_list/prefs/%gconf.xml
4 ./.gconf/apps/panel/applets/workspace_switcher/prefs/%gconf.xml
4 ./.gconf/desktop/gnome/accessibility/keyboard/%gconf.xml
4 ./.gconf/desktop/gnome/peripherals/keyboard/kbd/%gconf.xml
4 ./.gnome2/gedit/gedit-2
4 ./.gnome2/keyrings/login.keyring
4 ./.gnome2/nautilus-scripts
4 ./.gnome2/panel2.d/default/launchers
4 ./.gnome2/yelp
4 ./.gnote/addins
4 ./.gnote/bbc20544-d90b-41ef-986d-14e79a71d8b8.note
4 ./.gnote/e31c0bfc-8839-455f-a1fa-85812331a2f5.note
4 ./.gnupg/trustdb.gpg
4 ./.gtk-bookmarks
4 ./.gvfs
4 ./.local/share/applications/preferred-mail-reader.desktop
4 ./.local/share/applications/preferred-web-browser.desktop
4 ./.local/share/gvfs-metadata/home
4 ./.local/share/gvfs-metadata/label-CDROM
4 ./.local/share/gvfs-metadata/label-RHEL_6.0\x20i386\x20Disc\x201
4 ./.local/share/gvfs-metadata/uuid-38B8-2797
4 ./.local/share/gvfs-metadata/uuid-B801-BA9B
4 ./.local/share/Trash/files/a.sh
4 ./.local/share/Trash/files/test.txt
4 ./.local/share/Trash/info/a.sh.trashinfo
4 ./.local/share/Trash/info/test.2.html.trashinfo
4 ./.local/share/Trash/info/test.c.trashinfo
4 ./.local/share/Trash/info/test.html.trashinfo
4 ./.local/share/Trash/info/test.txt.trashinfo
4 ./main.cpp
4 ./.mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}
4 ./.mozilla/plugins
4 ./Music
4 ./.nautilus
4 ./Pictures
4 ./Public
4 ./.pulse/205d7fca86a0af0c45d758ee00000024-card-database.tdb
4 ./.pulse/205d7fca86a0af0c45d758ee00000024-default-sink
4 ./.pulse/205d7fca86a0af0c45d758ee00000024-default-source
4 ./.pulse-cookie
4 ./.recently-used.xbel
4 ./.RecycleBin/folder__DelTime:Sat_May__9_22:16:13_PDT_2015
4 ./.RecycleBin/folder__DelTime:Sat_May__9_22:16:38_PDT_2015
4 ./.ssh
4 ./taoge/test.cpp
4 ./Templates
4 ./test.c
4 ./test.cpp
4 ./test.sh
4 ./test/test.cpp
4 ./.thumbnails/fail/gnome-thumbnail-factory
4 ./.thumbnails/normal
4 ./tmp/test/add.c
4 ./tmp/test/add.h
4 ./tmp/test/inc
4 ./tmp/test/main.c
4 ./Videos
4 ./.vim/.netrwhist
4 ./.xauthGFiXuo
4 ./.xauthi3iigm
4 ./.xsession-errors
4 ./.xsession-errors.old
8 ./a.out
8 ./bin
8 ./.cache/gedit
8 ./cmd
8 ./.config/gnome-disk-utility
8 ./.config/gnome-session
8 ./.dbus/session-bus
8 ./Desktop/a.out
8 ./Desktop/learn_c/a.out
8 ./Desktop/learn_ldd/a.out
8 ./Desktop/learnMakeFile/main
8 ./Desktop/learn_nm/a.out
8 ./Desktop/learn_objdump/a.out
8 ./Desktop/learn_readelf/a.out
8 ./Desktop/learn_reg
8 ./Desktop/learn_shell
8 ./Desktop/reg
8 ./Desktop/sql
8 ./Desktop/test/tree-1.7.0/doc/tree.1.fr
8 ./Desktop/test/tree-1.7.0/hash.o
8 ./Desktop/test/tree-1.7.0/README
8 ./Desktop/test/tree-1.7.0/strverscmp.c
8 ./Desktop/test/tree-1.7.0/tree.h
8 ./Desktop/test/tree-1.7.0/unix.c
8 ./Desktop/tmp/a.out
8 ./Desktop/tree-1.7.0/doc/tree.1.fr
8 ./Desktop/tree-1.7.0/hash.o
8 ./Desktop/tree-1.7.0/README
8 ./Desktop/tree-1.7.0/strverscmp.c
8 ./Desktop/tree-1.7.0/tree.h
8 ./Desktop/tree-1.7.0/unix.c
8 ./.gconf/apps/brasero/config/priority
8 ./.gconf/apps/gedit-2/preferences/ui/statusbar
8 ./.gconf/apps/gnome-terminal/profiles/Default
8 ./.gconf/apps/gnote
8 ./.gconf/apps/nautilus/desktop-metadata/2@46@1@32@GB@32@Filesystem@46@volume
8 ./.gconf/apps/nautilus/desktop-metadata/8@46@0@32@GB@32@Filesystem@46@volume
8 ./.gconf/apps/nautilus/desktop-metadata/CDROM@46@volume
8 ./.gconf/apps/nautilus/desktop-metadata/computer
8 ./.gconf/apps/nautilus/desktop-metadata/directory
8 ./.gconf/apps/nautilus/desktop-metadata/home
8 ./.gconf/apps/nautilus/desktop-metadata/RHEL_6@46@0@32@i386@32@Disc@32@1@46@volume
8 ./.gconf/apps/nautilus/desktop-metadata/trash
8 ./.gconf/apps/nm-applet
8 ./.gconf/apps/panel/applets/clock/prefs
8 ./.gconf/apps/panel/applets/window_list/prefs
8 ./.gconf/apps/panel/applets/workspace_switcher/prefs
8 ./.gconf/desktop/gnome/accessibility/keyboard
8 ./.gconf/desktop/gnome/peripherals/keyboard/kbd
8 ./.gnome2/gedit
8 ./.gnome2/keyrings
8 ./.gnome2/panel2.d/default
8 ./.gnupg/gpg.conf
8 ./.mozilla/extensions
8 ./taoge/a.out
8 ./test
8 ./.thumbnails/fail
8 ./tmp/test/a.out
8 ./.vim
8 ./.viminfo
12 ./.a.txt.swp
12 ./.cache/event-sound-cache.tdb.205d7fca86a0af0c45d758ee00000024.i386-redhat-linux-gnu
12 ./.dbus
12 ./Desktop/learn_c
12 ./Desktop/learn_strings
12 ./Desktop/learn_strip
12 ./Desktop/test/tree-1.7.0/CHANGES
12 ./Desktop/test/tree-1.7.0/doc/tree.1
12 ./Desktop/test/tree-1.7.0/json.c
12 ./Desktop/test/tree-1.7.0/xml.c
12 ./Desktop/tree-1.7.0/CHANGES
12 ./Desktop/tree-1.7.0/doc/tree.1
12 ./Desktop/tree-1.7.0/json.c
12 ./Desktop/tree-1.7.0/xml.c
12 ./.gconf/apps/gedit-2/preferences/ui
12 ./.gconf/apps/gnome-terminal/profiles
12 ./.gconf/apps/panel/applets/clock
12 ./.gconf/apps/panel/applets/window_list
12 ./.gconf/apps/panel/applets/workspace_switcher
12 ./.gconf/desktop/gnome/accessibility
12 ./.gconf/desktop/gnome/peripherals/keyboard
12 ./.gnome2/panel2.d
12 ./.local/share/applications
12 ./.local/share/Trash/files
12 ./.RecycleBin
16 ./.bash_history
16 ./Desktop/learn_nm
16 ./Desktop/learn_readelf
16 ./Desktop/test/tree-1.7.0/color.c
16 ./Desktop/test/tree-1.7.0/html.c
16 ./Desktop/test/tree-1.7.0/unix.o
16 ./Desktop/tree-1.7.0/color.c
16 ./Desktop/tree-1.7.0/html.c
16 ./Desktop/tree-1.7.0/unix.o
16 ./.gconf/apps/brasero/config
16 ./.gconf/apps/gedit-2/preferences
16 ./.gconf/apps/gnome-terminal
16 ./.gconf/desktop/gnome/peripherals
16 ./.gnote
16 ./.gnupg
16 ./.ICEauthority
16 ./.mozilla
16 ./taoge
16 ./.thumbnails
20 ./Desktop/learn_objdump
20 ./Desktop/test/tree-1.7.0/json.o
20 ./Desktop/test/tree-1.7.0/LICENSE
20 ./Desktop/test/tree-1.7.0/xml.o
20 ./Desktop/tree-1.7.0/json.o
20 ./Desktop/tree-1.7.0/LICENSE
20 ./Desktop/tree-1.7.0/xml.o
20 ./.gconf/apps/brasero
20 ./.gconf/apps/gedit-2
24 ./.cache
24 ./.local/share/Trash/info
28 ./.config
28 ./Desktop/test/tree-1.7.0/color.o
28 ./Desktop/test/tree-1.7.0/doc
28 ./Desktop/test/tree-1.7.0/html.o
28 ./Desktop/tree-1.7.0/color.o
28 ./Desktop/tree-1.7.0/doc
28 ./Desktop/tree-1.7.0/html.o
28 ./tmp/test
32 ./.gconf/desktop/gnome
32 ./.local/share/gvfs-metadata/home-27d2d18f.log
32 ./.local/share/gvfs-metadata/label-CDROM-692a0446.log
32 ./.local/share/gvfs-metadata/label-RHEL_6.0\x20i386\x20Disc\x201-22a4ce3f.log
32 ./.local/share/gvfs-metadata/uuid-38B8-2797-73f21b7b.log
32 ./.local/share/gvfs-metadata/uuid-B801-BA9B-b25463a0.log
32 ./tmp
36 ./Desktop/learn_file
36 ./Desktop/learn_ldd
36 ./Desktop/test/tree-1.7.0/tree.c
36 ./Desktop/tree-1.7.0/tree.c
36 ./.gconf/desktop
40 ./Desktop/tmp
40 ./.gconf/apps/panel/applets
40 ./.gnome2
40 ./.local/share/Trash
44 ./.gconf/apps/panel
48 ./Desktop/test/tree-1.7.0.tgz
48 ./Desktop/tree-1.7.0.tgz
60 ./.pulse/205d7fca86a0af0c45d758ee00000024-device-volumes.tdb
64 ./Desktop/learnMakeFile
68 ./Desktop/test/tree-1.7.0/tree.o
68 ./Desktop/tree-1.7.0/tree.o
68 ./.gconf/apps/nautilus/desktop-metadata
72 ./.gconf/apps/nautilus
72 ./.gconfd/saved_state
72 ./.pulse/205d7fca86a0af0c45d758ee00000024-stream-volumes.tdb
76 ./.gconfd
120 ./Desktop/test/tree-1.7.0/tree
120 ./Desktop/tree-1.7.0/tree
148 ./.pulse
184 ./.local/share/gvfs-metadata
192 ./.gconf/apps
232 ./.gconf
240 ./.local/share
244 ./.local
276 ./Desktop/lrzsz-0.12.20.tar.gz
368 ./.gstreamer-0.10/registry.i386.bin
372 ./.gstreamer-0.10
512 ./Desktop/test/tree-1.7.0
512 ./Desktop/tree-1.7.0
564 ./Desktop/test
1736 ./Desktop
126608 ./jdk-7u51-windows-i586.exe
129852 .
du -a是列出所有文件/目录大小， sort -n是按照number进行排序。
注意， 在该例中， 不能用du -ah， 否则可能会出现1.7M < 2k这样的问题。 另外， sort的-n不可忽略。
对于linux而言， 执行完一条命令后， 我们很容易看到执行结果的最后几行（离即将输入的地方最近）， 所以， 几乎不用更多的过滤。
如果又想排序， 又想看大小， 怎么办呢？ 再配合awk和args吧。
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