linux 中檢查磁盤空間的 df 命令
來(lái)自：入門小站
1. 檢查文件系統(tǒng)磁盤空間使用情況
這?df?命令顯示文件系統(tǒng)上的設(shè)備名稱、總塊數(shù)、總磁盤空間、已用磁盤空間、可用磁盤空間和掛載點(diǎn)信息。
[root@local?~]#?df
Filesystem???????????1K-blocks??????Used?Available?Use%?Mounted?on
/dev/cciss/c0d0p2?????78361192??23185840??51130588??32%?/
/dev/cciss/c0d0p5?????24797380??22273432???1243972??95%?/home
/dev/cciss/c0d0p3?????29753588??25503792???2713984??91%?/data
/dev/cciss/c0d0p1???????295561?????21531????258770???8%?/boot
tmpfs???????????????????257476?????????0????257476???0%?/dev/shm
2. 顯示所有文件系統(tǒng)磁盤空間使用信息
與上面相同，但它還顯示虛擬文件系統(tǒng)的信息以及所有文件系統(tǒng)磁盤使用情況及其內(nèi)存使用情況。
[root@local?~]#?df?-a
Filesystem???????????1K-blocks??????Used?Available?Use%?Mounted?on
/dev/cciss/c0d0p2?????78361192??23186116??51130312??32%?/
proc?????????????????????????0?????????0?????????0???-??/proc
sysfs????????????????????????0?????????0?????????0???-??/sys
devpts???????????????????????0?????????0?????????0???-??/dev/pts
/dev/cciss/c0d0p5?????24797380??22273432???1243972??95%?/home
/dev/cciss/c0d0p3?????29753588??25503792???2713984??91%?/data
/dev/cciss/c0d0p1???????295561?????21531????258770???8%?/boot
tmpfs???????????????????257476?????????0????257476???0%?/dev/shm
none?????????????????????????0?????????0?????????0???-??/proc/sys/fs/binfmt_misc
sunrpc???????????????????????0?????????0?????????0???-??/var/lib/n
3. 以人類可讀的格式顯示磁盤空間使用情況
你有沒(méi)有注意到，上面的命令以字節(jié)為單位顯示信息，根本不可讀，因?yàn)槲覀兞?xí)慣于以兆字節(jié)、千兆字節(jié)等形式讀取大小，這樣很容易理解和記憶。
這df命令提供了一個(gè)選項(xiàng)來(lái)顯示尺寸Human Readable格式通過(guò)使用'-h'（以人類可讀的格式打印結(jié)果（例如，1K 2M 3G))。
[root@local?~]#?df?-h
Filesystem????????????Size??Used?Avail?Use%?Mounted?on
/dev/cciss/c0d0p2??????75G???23G???49G??32%?/
/dev/cciss/c0d0p5??????24G???22G??1.2G??95%?/home
/dev/cciss/c0d0p3??????29G???25G??2.6G??91%?/data
/dev/cciss/c0d0p1?????289M???22M??253M???8%?/boot
tmpfs?????????????????252M?????0??252M???0%?/dev/shm
4. 顯示 / home 文件系統(tǒng)信息
查看唯一設(shè)備的信息/home人類可讀格式的文件系統(tǒng)使用以下命令。
[root@local?~]#?df?-hT?/home
Filesystem??Type????Size??Used?Avail?Use%?Mounted?on
/dev/cciss/c0d0p5?ext3?????24G???22G??1.2G??95%?/home
5. 以字節(jié)為單位顯示文件系統(tǒng)信息
顯示所有文件系統(tǒng)信息和使用情況1024-byte塊，使用選項(xiàng)'-k'（例如--block-size=1K）如下。
[root@local?~]#?df?-k
Filesystem???????????1K-blocks??????Used?Available?Use%?Mounted?on
/dev/cciss/c0d0p2?????78361192??23187212??51129216??32%?/
/dev/cciss/c0d0p5?????24797380??22273432???1243972??95%?/home
/dev/cciss/c0d0p3?????29753588??25503792???2713984??91%?/data
/dev/cciss/c0d0p1???????295561?????21531????258770???8%?/boot
tmpfs???????????????????257476?????????0????257476???0%?/dev/shm
6. 以MB為單位顯示文件系統(tǒng)信息
顯示所有文件系統(tǒng)使用信息MB(Mega Byte) 將該選項(xiàng)用作?-m。
[root@local?~]#?df?-m
Filesystem???????????1M-blocks??????Used?Available?Use%?Mounted?on
/dev/cciss/c0d0p2????????76525?????22644?????49931??32%?/
/dev/cciss/c0d0p5????????24217?????21752??????1215??95%?/home
/dev/cciss/c0d0p3????????29057?????24907??????2651??91%?/data
/dev/cciss/c0d0p1??????????289????????22???????253???8%?/boot
tmpfs??????????????????????252?????????0???????252???0%?/dev/shm
7. 以 GB 為單位顯示文件系統(tǒng)信息
顯示所有文件系統(tǒng)統(tǒng)計(jì)信息GB(Gigabyte) 將該選項(xiàng)用作 'df -h'。
[root@local?~]#?df?-h
Filesystem????????????Size??Used?Avail?Use%?Mounted?on
/dev/cciss/c0d0p2??????75G???23G???49G??32%?/
/dev/cciss/c0d0p5??????24G???22G??1.2G??95%?/home
/dev/cciss/c0d0p3??????29G???25G??2.6G??91%?/data
/dev/cciss/c0d0p1?????289M???22M??253M???8%?/boot
tmpfs?????????????????252M?????0??252M???0%?/dev/shm
8. 顯示文件系統(tǒng) inode
使用?-i開(kāi)關(guān)將顯示文件系統(tǒng)的已使用 inode 數(shù)量及其百分比信息。
[root@local?~]#?df?-i
Filesystem????????????Inodes???IUsed???IFree?IUse%?Mounted?on
/dev/cciss/c0d0p2????20230848??133143?20097705????1%?/
/dev/cciss/c0d0p5????6403712??798613?5605099???13%?/home
/dev/cciss/c0d0p3????7685440?1388241?6297199???19%?/data
/dev/cciss/c0d0p1??????76304??????40???76264????1%?/boot
tmpfs??????????????????64369???????1???64368????1%?/dev/shm??????????????252M?????0??252M???0%?/dev/shm
9. 顯示文件系統(tǒng)類型
如果您注意到上述所有命令輸出，您將看到結(jié)果中沒(méi)有提到Linux 文件系統(tǒng)類型。要檢查系統(tǒng)的文件系統(tǒng)類型，請(qǐng)使用選項(xiàng)?T。它將顯示文件系統(tǒng)類型以及其他信息。
[root@local?~]#?df?-T
Filesystem??Type???1K-blocks??Used??????Available?Use%?Mounted?on
/dev/cciss/c0d0p2?ext3????78361192??23188812??51127616??32%???/
/dev/cciss/c0d0p5?ext3????24797380??22273432??1243972???95%???/home
/dev/cciss/c0d0p3?ext3????29753588??25503792??2713984???91%???/data
/dev/cciss/c0d0p1?ext3????295561?????21531????258770????8%????/boot
tmpfs???tmpfs???257476?????????0????257476????0%???/dev/shm
10. 包括某些文件系統(tǒng)類型
如果要顯示某些文件系統(tǒng)類型，請(qǐng)使用?-t?選項(xiàng)。例如下面的命令只會(huì)顯示ext3文件系統(tǒng)。
[root@local?~]#?df?-t?ext3
Filesystem???????????1K-blocks??????Used?Available?Use%?Mounted?on
/dev/cciss/c0d0p2?????78361192??23190072??51126356??32%?/
/dev/cciss/c0d0p5?????24797380??22273432???1243972??95%?/home
/dev/cciss/c0d0p3?????29753588??25503792???2713984??91%?/data
/dev/cciss/c0d0p1???????295561?????21531????258770???8%?/boot
11. 排除某些文件系統(tǒng)類型
如果要顯示不屬于的文件系統(tǒng)類型ext3鍵入使用選項(xiàng)作為?-x。例如，以下命令將只顯示除ext3.
[root@local?~]#?df?-x?ext3
Filesystem???????????1K-blocks??????Used?Available?Use%?Mounted?on
tmpfs???????????????????257476?????????0????257476???0%?/dev/shm
12. 顯示 df 命令的信息。
使用'--help' 開(kāi)關(guān)將顯示與df命令。
[root@local?~]#?df?--help
Usage:?df?[OPTION]...?[FILE]...
Show?information?about?the?file?system?on?which?each?FILE?resides,
or?all?file?systems?by?default.
Mandatory?arguments?to?long?options?are?mandatory?for?short?options?too.
??-a,?--all?????????????include?dummy?file?systems
??-B,?--block-size=SIZE?use?SIZE-byte?blocks
??-h,?--human-readable??print?sizes?in?human?readable?format?(e.g.,?1K?234M?2G)
??-H,?--si??????????????likewise,?but?use?powers?of?1000?not?1024
??-i,?--inodes??????????list?inode?information?instead?of?block?usage
??-k????????????????????like?--block-size=1K
??-l,?--local???????????limit?listing?to?local?file?systems
??????--no-sync?????????do?not?invoke?sync?before?getting?usage?info?(default)
??-P,?--portability?????use?the?POSIX?output?format
??????--sync????????????invoke?sync?before?getting?usage?info
??-t,?--type=TYPE???????limit?listing?to?file?systems?of?type?TYPE
??-T,?--print-type??????print?file?system?type
??-x,?--exclude-type=TYPE???limit?listing?to?file?systems?not?of?type?TYPE
??-v????????????????????(ignored)
??????--help?????display?this?help?and?exit
??????--version??output?version?information?and?exit
SIZE?may?be?(or?may?be?an?integer?optionally?followed?by)?one?of?following:
kB?1000,?K?1024,?MB?1000*1000,?M?1024*1024,?and?so?on?for?G,?T,?P,?E,?Z,?Y.
Report?bugs?to?.
來(lái)源：入門小站
（版權(quán)歸原作者所有，侵刪）
評(píng)論
圖片
表情