救命阿,rm命令能否undo?

slashseed

debian系统,在root shell下不小心用rm命令删除了/usr/bin/目录下部分可执行文件,请问有没有什么办法能补救?
这简直是悲剧,目前系统属于半瘫痪状态,man了下rm没提到恢复,是否说它是不可恢复的?


如果不能恢复,我想能不能写个这样的脚本:

首先枚举所有已安装的包;
对每个包查看它是否有文件安装到/usr/bin/目录下;
如果有的话再看下这个文件当前还是否存在,若不存在的话则将此包表记,若存在转到上一步,直至枚举完全;
最后所有的表记的包导入一个文本文件里面.

现在我已经费了吃奶的劲才手动恢复到能重启和执行基本的shell命令的状态,太郁闷了
望各位不吝出手相救阿,偶不想再重装阿,太残忍了,  T_T

yongjian

sorry to hear this. my heart is with you... the actually files are still there (all the inodes) but the thing is I am not aware of a way to retrieve them. maybe someone else would know. As of the second way, you can try this but only if your dpkg cmd is still there...

1. dpkg --get-selections >/tmp/pkg.list
2. cat /tmp/pkg.list|awk '{print $1}'|while read pkgname; do
3.          a=$(dpkg -L $pkgname | grep '/usr/bin')
4.          if [[ $a != "" ]]; then
5.                echo $a | while read line; do
6.                     ls $line 2>&1 >/dev/null
7.                     [[ $? -ne 0 ]] && echo $pkgname is missing $line | tee -a /tmp/missingbinary.list
8.                done
9.         fi
10. done

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slashseed

谢谢版大!!
你是我的偶像,我都想要给你刻个雕像用来膜拜了

还好,这样基本上恢复了:p

1. 
   
2. apt-get install --reinstall alien alsa-firmware-loaders alsa-tools-gui alsa-utils amule ant apache2-utils at automake1.8  binutils bittornado blinken bsdma\
   
3. inutils bsh camediaplay cdrdao cdrecord console-tools cvs dbus dcoprss dctrl-tools debhelper debianutils defoma devscripts dictionaries-common dictzip dose\
   
4. mu dselect e2fsprogs easytag emacs21-bin-common enscript epiphany-browser epplets esound exim4-daemon-light fblogo fdutils file g++-4.1 gcalctool gcc-4.0 g\
   
5. cc-4.1 gconf2 gettext gettext-base gimp glade gnome-cups-manager gnome-media gnome-panel gnome-volume-manager gnomemeeting gnumeric gnupg gs-common gtk-sha\
   
6. rp2-gapi gtk-theme-switch gucharmap hal highlight hspell info iproute kcoloredit kdepim-wizards kernel-package kfloppy kgpg khexedit kjots klaptopdaemon kl\
   
7. eopatra kmail kmtrace knewsticker knode konq-plugins konversation korganizer kpdf kpilot krec kscreensaver ksirc kstars ksubtile ksysguardd kunittest kview\
   
8. shell less lftp libaa1-dev libakode2 libarts1c2a libdirectfb-dev libenchant1c2a libfreetype6-dev libgconf-cil libglib2.0-dev libhsqldb-java libjpeg-progs l\
   
9. ibpango1.0-common libpcre3-dev libtiff-tools libwww-perl lockfile-progs  mailx mc mesa-utils metacity mime-support mono-gmcs mono-mcs mono-utils monodoc-ba\
   
10. se mpeglib  ncurses-bin netpbm networkstatus noatun-plugins nvi odbcinst1debian1 openssh-client openssl pciutils perl perl-base pmount po-debconf poster pr\
    
11. ocps proftpd psutils python-central python2.4 qt3-designer rpm ruby1.8 samba scrollkeeper shared-mime-info smb4k smbc smbfs sqlite stardict subversion tcng\
    
12. thunderbird tk8.4 unzip util-linux vlc  wireshark wireshark-common xchm xfonts-utils xine-ui xmame-tools xscreensaver xserver-xorg-input-synaptics xterm x\
    
13. utils xutils-dev xxdiff
    

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yongjian

good to hear!

xiaorui

/usr/bin下已经全删除了，
但是/bin 或/sbin下依然有，lZ真是命大亚··

dpkg --get-selections >/tmp/pkg.list
cat /tmp/pkg.list|awk '{print $1}'|while read pkgname; do
         a=$(dpkg -L $pkgname | grep '/usr/bin')
         if [[ $a != "" ]]; then
               echo $a | while read line; do
                    ls $line 2>&1 >/dev/null
                    [[ $? -ne 0 ]] && echo $pkgname is missing $line | tee -a /tmp/missingbinary.list
               done
        fi
done

确实不错，但是不是全部都可以恢复。最好是可以通过updatadb的里的数据。感觉哪里是比较全的软件记录。

但是首先一定要apt回来，要不然启动就没有东西了