[root@web2-server yum.repos.d]# umount /mnt/cdrom/ umount: /mnt/cdrom: device is busy. ? ? ? ? (In some cases useful info about processes that use ? ? ? ? ?the device is found by lsof(8) or fuser(1))
[root@web2-server yum.repos.d]# umount /mnt/cdrom/ -f ? ?//強(qiáng)制卸載也不行 umount2: 設(shè)備或資源忙 umount: /mnt/cdrom: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) umount2: 設(shè)備或資源忙 [root@web2-server yum.repos.d]#?fuser -m /mnt/cdrom/ /mnt/cdrom/: ? ? ? ? ?1338c [root@web2-server yum.repos.d]# ps aux |grep 1338 root ? ? ?1338 ?0.0 ?0.2 108292 ?1912 pts/2 ? ?Ss+ ?14:27 ? 0:00 -bash root ? ? ?1423 ?0.0 ?0.1 103236 ? 884 pts/1 ? ?S+ ? 14:49 ? 0:00 grep 1338 [root@web2-server yum.repos.d]#?kill -9 1338 [root@web2-server yum.repos.d]# fuser -m /mnt/cdrom [root@web2-server yum.repos.d]# umount /mnt/cdrom/ [root@web2-server yum.repos.d]#?
========================================================= 附fuser命令詳解：

linux fuser

?

用fuser殺掉進(jìn)程

一，為什么要使用fuser?
?? 先說 fuser的作用，fuser能識別出正在對某個文件或端口訪問的進(jìn)程

大家想一下，還有哪個命令具備這個功能? 沒錯，是lsof,我們前面講過,?lsof能夠找出正在對指定文件訪問的進(jìn)程，

那么它們兩者之間有何區(qū)別?

fuser有一個特別的用法在于它可以一次殺死那些正在訪問指定文件的進(jìn)程。???

二，如何使用fuser?

???1,如何用fuser得到正在使用指定文件的進(jìn)程?
???? 用法: fuser 文件
???? 說明：它會把正在使用當(dāng)前文件的進(jìn)程id列出

???? [root@localhost lhd]# umount /
???? umount: /: device is busy.
?????????? (In some cases useful info about processes that use
??????????? the device is found by lsof(8) or fuser(1))
???? [root@localhost lhd]# fuser /
????? /:?????????????????????? 1rc???? 2rc???? 3rc???? 4rc???? 5rc???? 6rc???? 7rc??? 80rc??? 82rc??? 84rc??? 85rc?? 153rc?? 157rc?? 158rc
?????????????????????????????? 160rc?? 165rc?? 168rc? 203rc?? 204rc?? 205rc?? 253rc?? 441rc?? 444rc?? 516rc?? 521rc?? 524rc?? 582rc?? 583rc?
?????????????????????????????? 584rc?? 633rc? 1052rc? 1392rc? 1394rc? 1417rc? 1597rc? 1609rc? 1617rc? 1620rc? 1683rc? 1744rc? 1783r? 1785rc
?????????????????????????????? 1788rc? 1806r? 1808r? 1810rc? 1811rc? 1812rc? 1813rc? 1814rc? 1815rc? 1848rc? 1886rc? 1899rc? 1900rc? 2001rc?
?????????????????????????????? ......太多不一一列出

????? 說明:
????? 這些進(jìn)程號后面的rc是什么意思?
??????
????? c 將此文件作為當(dāng)前目錄使用。?
????? e 將此文件作為程序的可執(zhí)行對象使用。?
????? r 將此文件作為根目錄使用。?
????? s 將此文件作為共享庫（或其他可裝載對象）使用

??2,如何列出進(jìn)程的詳細(xì)信息，而不僅僅是進(jìn)程id?
???? 用 -v參數(shù)即可
???? 說明: -v:? 含義是:verbose output,詳細(xì)的輸出信息
???? 例子:

???? [root@dev ~]# fuser /var/log
???? /var/log:???????????? 4196c
???? [root@dev ~]# fuser -v /var/log
??????
????????????????????????? USER??????? PID ACCESS COMMAND
???? /var/log:??????????? root?????? 4196 ..c.. bash

???3,如何列出進(jìn)程所屬的用戶?
???? 用 -u參數(shù)即可
????說明: -u: 含義：display user IDs，顯示用戶id
?????
???? 例子:
???? [root@dev ~]# fuser -u /var/log
???? /var/log:???????????? 4196c(root)

?????4,如何殺死所有正在訪問指定文件的進(jìn)程?
???? 用 -k參數(shù)即可
???? 說明: -k：含義: kill processes accessing the named file

???? 例子:

???? [root@localhost lhd]# fuser -v /root/install.log
????????????????????????? 用戶???? 進(jìn)程號 權(quán)限?? 命令
???? /root/install.log:?? root?????? 3185 f.... tail
???? [root@localhost lhd]# fuser -k /root/install.log
???? /root/install.log:??? 3185
???? [root@localhost lhd]# fuser -v /root/install.log

???? 說明:?-k參數(shù)能夠殺死所有的正在訪問指定文件的進(jìn)程，所以用來殺進(jìn)程時非常方便
???? 說明之二: fuser如何殺死的進(jìn)程？
???????????? 它發(fā)送的是這個信號:SIGKILL



三，多學(xué)一點(diǎn)知識

????1,fuser可以列出它所知的信號:
???? 用 -l參數(shù)即可
?????
???? 例子:
???? [root@dev ~]# fuser -l
???? HUP INT QUIT ILL TRAP ABRT IOT BUS FPE KILL USR1 SEGV USR2 PIPE ALRM TERM
???? STKFLT CHLD CONT STOP TSTP TTIN TTOU URG XCPU XFSZ VTALRM PROF WINCH IO PWR SYS
???? UNUSED

????2,fuser可以發(fā)送它已知的信號給訪問的指定文件進(jìn)程而代替-k參數(shù)默認(rèn)發(fā)送的SIGKILL
????? 例如：只是掛起進(jìn)程，那么發(fā)送HUP信號就可以了
?????
????? 例子:
????? [root@localhost lhd]# fuser -v /root/install.log
?????????????????????????? 用戶???? 進(jìn)程號 權(quán)限?? 命令
????? /root/install.log:?? root?????? 3347 f.... tail
????? [root@localhost lhd]# fuser -k -SIGHUP /root/install.log
????? /root/install.log:??? 3347
????? [root@localhost lhd]# fuser -v /root/install.log

總結(jié)

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