網(wǎng)站首頁 編程語言 正文
前言
一提到在 linux 環(huán)境下刪除文件，那絕對離不開 sudo rm -rf /* 這個(gè)梗，每次看到這個(gè)命令，我都想到一幅惡搞的圖片：
這個(gè)『清理垃圾』的說明真是解釋的“恰到好處”，據(jù)說有小白在論壇問問題，被人開玩笑的回復(fù)了 sudo rm -rf /* 這個(gè)命令，結(jié)果問題就解決了，人也拜拜了~
從刪庫到跑路，一天一個(gè)入獄小技巧，所以我們一定要謹(jǐn)慎使用 rm -rf 命令，這相當(dāng)于我們在 Windows 上使用 Shift+Delete 組合，文件不會放到回收站中，而是直接永久刪除了，在 Linux 中執(zhí)行 rm 命令就相當(dāng)于永久刪除。
雖說 sudo rm -rf /* 危險(xiǎn)無比，但是我們很少會直接這樣寫，但是 rm 命令還是經(jīng)常用的，這不就在前幾天，辛辛苦苦寫的Shell腳本就被我直接 rm -rf 刪掉了，幸虧我之前將內(nèi)容打印到了控制臺，否則整個(gè)腳本就白寫了。
rm之后還有救嗎
盡管 rm 命令表示永久刪除，但是不代表文件就一定找不回來，只是找回的幾率有大有小。其實(shí)刪除命令只是在文件節(jié)點(diǎn)中作刪除標(biāo)記，并不真正清除文件內(nèi)容，如果刪除后馬上進(jìn)行恢復(fù)，那么成功的概率還是很大的，但是如果其他用戶一直在用這臺機(jī)器，或者有一些寫盤操作的進(jìn)程一直在執(zhí)行，那么這部分?jǐn)?shù)據(jù)可能很快就會被覆蓋。這時(shí)基本上就無法恢復(fù)該文件了。
使用foremost找回文件
foremost 是一個(gè)基于文件頭和尾部信息以及文件的內(nèi)建數(shù)據(jù)結(jié)構(gòu)恢復(fù)文件的命令行工具，接下來是安裝和恢復(fù)的步驟：
安裝 foremost
CentOS系統(tǒng)直接運(yùn)行 sudo yum install https://forensics.cert.org/centos/cert/7/x86_64//foremost-1.5.7-13.1.el7.x86_64.rpm -y 命令就可以完成
如果是Ubuntu系統(tǒng)請嘗試命令：sudo apt install foremost
[root@VM-0-3-centos ~]# sudo yum install https://forensics.cert.org/centos/cert/7/x86_64//foremost-1.5.7-13.1.el7.x86_64.rpm -y Loaded plugins: fastestmirror, langpacks Repository epel is listed more than once in the configuration foremost-1.5.7-13.1.el7.x86_64.rpm | 46 kB 00:00:01 Examining /var/tmp/yum-root-XJIfxM/foremost-1.5.7-13.1.el7.x86_64.rpm: foremost-1.5.7-13.1.el7.x86_64 Marking /var/tmp/yum-root-XJIfxM/foremost-1.5.7-13.1.el7.x86_64.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package foremost.x86_64 0:1.5.7-13.1.el7 will be installed --> Finished Dependency Resolution epel/7/x86_64 | 4.7 kB 00:00:00 epel/7/x86_64/group_gz | 96 kB 00:00:00 epel/7/x86_64/updateinfo | 1.0 MB 00:00:00 epel/7/x86_64/primary_db | 7.0 MB 00:00:01 extras/7/x86_64 | 2.9 kB 00:00:00 extras/7/x86_64/primary_db | 243 kB 00:00:00 os/7/x86_64 | 3.6 kB 00:00:00 updates/7/x86_64 | 2.9 kB 00:00:00 updates/7/x86_64/primary_db | 12 MB 00:00:01 Dependencies Resolved ===================================================================================================================== Package Arch Version Repository Size ===================================================================================================================== Installing: foremost x86_64 1.5.7-13.1.el7 /foremost-1.5.7-13.1.el7.x86_64 85 k Transaction Summary ===================================================================================================================== Install 1 Package Total size: 85 k Installed size: 85 k Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : foremost-1.5.7-13.1.el7.x86_64 1/1 Verifying : foremost-1.5.7-13.1.el7.x86_64 1/1 Installed: foremost.x86_64 0:1.5.7-13.1.el7 Complete! [root@VM-0-3-centos ~]#
創(chuàng)建一個(gè)測試文件
[root@VM-0-3-centos ~]# echo "this is a important file">important.txt [root@VM-0-3-centos ~]# pwd /root [root@VM-0-3-centos ~]# ls connecttendis.sh important.txt restore tarlist tendis test.iso [root@VM-0-3-centos ~]# mkdir -p /tmp/restore
刪除文件后嘗試還原
[root@VM-0-3-centos ~]# rm important.txt [root@VM-0-3-centos ~]# foremost -i /dev/vda1 -o /tmp/restore/ Processing: /dev/vda1 |***********Segmentation fault
執(zhí)行幾分鐘之后崩潰，恢復(fù)失敗，打開目錄查看發(fā)現(xiàn)：
[root@VM-0-3-centos ~]# ls /tmp/restore/ audit.txt bmp doc exe htm jpg mov mpg pdf ppt rar sdw sxc sxw wav xls zip avi dll docx gif jar mbd mp4 ole png pptx rif sx sxi vis wmv xlsx
看來與需要恢復(fù)的文件類型有關(guān)，換臺機(jī)器再換一個(gè)png文件試試，先找一個(gè)showball.png測試文件，然后確認(rèn)分區(qū) /dev/vda1
[root@VM-0-3-centos ~]# df Filesystem 1K-blocks Used Available Use% Mounted on devtmpfs 930496 0 930496 0% /dev tmpfs 941004 24 940980 1% /dev/shm tmpfs 941004 508 940496 1% /run tmpfs 941004 0 941004 0% /sys/fs/cgroup /dev/vda1 51473868 6458344 42692404 14% / /dev/loop0 361650 361650 0 100% /mnt/iso tmpfs 188204 0 188204 0% /run/user/0 [root@VM-0-3-centos ~]# pwd /root [root@VM-0-3-centos ~]# ls restore showball.png
刪除png文件后嘗試恢復(fù)，進(jìn)度條結(jié)束后即可進(jìn)入指定的目錄 /root/restore/ 查看
[root@VM-0-3-centos ~]# rm showball.png rm: remove regular file ‘showball.png'? y [root@VM-0-3-centos ~]# pwd /root [root@VM-0-3-centos ~]# foremost -t png -i /dev/vda1 -o /root/restore/ Processing: /dev/vda1 |*********************************************************************************************|
在指定目錄下會有一個(gè) audit.txt 統(tǒng)計(jì)文件和一個(gè)類型文件夾 png
[root@VM-0-3-centos ~]# ll restore/ total 40 -rw-r--r-- 1 root root 24548 Nov 27 22:57 audit.txt drwxr-xr-- 2 root root 16384 Nov 27 22:56 png [root@VM-0-3-centos ~]# cd restore/ [root@VM-0-3-centos restore]# ll png total 43764 -rw-r--r-- 1 root root 3500 Nov 27 22:53 00367400.png -rw-r--r-- 1 root root 3578 Nov 27 22:53 00367408.png -rw-r--r-- 1 root root 3445 Nov 27 22:53 00367416.png -rw-r--r-- 1 root root 368 Nov 27 22:53 00367432.png -rw-r--r-- 1 root root 363 Nov 27 22:53 00367456.png -rw-r--r-- 1 root root 392 Nov 27 22:53 00367464.png -rw-r--r-- 1 root root 199 Nov 27 22:53 00367616.png ...
png目錄下的文件名都是一些編號，與原來刪除的文件完全不一樣了，需要根據(jù) audit.txt 文件確認(rèn)，打開文件確認(rèn)一下：
[root@VM-0-3-centos restore]# head audit.txt Foremost version 1.5.7 by Jesse Kornblum, Kris Kendall, and Nick Mikus Audit File Foremost started at Sat Nov 27 22:53:48 2021 Invocation: foremost -t png -i /dev/vda1 -o /root/restore/ Output directory: /root/restore Configuration file: /etc/foremost.conf ------------------------------------------------------------------ File: /dev/vda1 Start: Sat Nov 27 22:53:48 2021 [root@VM-0-3-centos restore]# head -n 20 audit.txt Foremost version 1.5.7 by Jesse Kornblum, Kris Kendall, and Nick Mikus Audit File Foremost started at Sat Nov 27 22:53:48 2021 Invocation: foremost -t png -i /dev/vda1 -o /root/restore/ Output directory: /root/restore Configuration file: /etc/foremost.conf ------------------------------------------------------------------ File: /dev/vda1 Start: Sat Nov 27 22:53:48 2021 Length: 49 GB (53686025728 bytes) Num Name (bs=512) Size File Offset Comment 0: 00367400.png 3 KB 188108800 (16 x 16) 1: 00367408.png 3 KB 188112896 (16 x 16) 2: 00367416.png 3 KB 188116992 (16 x 16) 3: 00367432.png 368 B 188125184 (16 x 16) 4: 00367456.png 363 B 188137472 (16 x 16) 5: 00367464.png 392 B 188141568 (16 x 16) ...
audit.txt 文件中記錄著恢復(fù)文件的簡要信息，這需要你知道原來刪除文件的相關(guān)信息，不然就只能一個(gè)個(gè)打開查看了，我是通過分辨率查找的
[root@VM-0-3-centos restore]# grep "1217" audit.txt 116: 12888200.png 40 KB 6598758400 (1217 x 690) 360: 38088960.png 40 KB 19501547520 (1217 x 690)
根據(jù)過濾出的信息把 12888200.png 打開發(fā)現(xiàn)就是自己“誤刪”的文件這就恢復(fù)好了
使用extundelete找回文件
extundelete 支持ext3、ext4文件系統(tǒng)下的文件恢復(fù)，使用 cat /etc/fstab 可以在linux環(huán)境下查看文件系統(tǒng)類型
[root@VM-0-3-centos ~]# cat /etc/fstab UUID=21dbe030-aa71-4b3a-8610-3b942dd447fa / ext4 noatime,acl,user_xattr 1 1 proc /proc proc defaults 0 0 sysfs /sys sysfs noauto 0 0 debugfs /sys/kernel/debug debugfs noauto 0 0 devpts /dev/pts devpts mode=0620,gid=5 0 0 [root@VM-0-3-centos ~]#
安裝依賴文件
[root@VM-0-3-centos ~]# yum install e2fsprogs-devel Loaded plugins: fastestmirror, langpacks Repository epel is listed more than once in the configuration Determining fastest mirrors epel | 4.7 kB 00:00:00 extras | 2.9 kB 00:00:00 os | 3.6 kB 00:00:00 updates | 2.9 kB 00:00:00 (1/2): epel/7/x86_64/updateinfo | 1.0 MB 00:00:00 (2/2): epel/7/x86_64/primary_db | 7.0 MB 00:00:01 Resolving Dependencies --> Running transaction check ---> Package e2fsprogs-devel.x86_64 0:1.42.9-19.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved =============================================================================================================== Package Arch Version Repository Size =============================================================================================================== Installing: e2fsprogs-devel x86_64 1.42.9-19.el7 os 73 k Transaction Summary =============================================================================================================== Install 1 Package Total download size: 73 k Installed size: 162 k Is this ok [y/d/N]: y Downloading packages: e2fsprogs-devel-1.42.9-19.el7.x86_64.rpm | 73 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : e2fsprogs-devel-1.42.9-19.el7.x86_64 1/1 Verifying : e2fsprogs-devel-1.42.9-19.el7.x86_64 1/1 Installed: e2fsprogs-devel.x86_64 0:1.42.9-19.el7 Complete! [root@VM-0-3-centos ~]#
下載extundelete源碼
[root@VM-0-3-centos ~]# wget https://src.fedoraproject.org/repo/pkgs/extundelete/extundelete-0.2.4.tar.bz2/77e626ad31433680c0a222069295d2ca/extundelete-0.2.4.tar.bz2 --2021-11-28 18:36:15-- https://src.fedoraproject.org/repo/pkgs/extundelete/extundelete-0.2.4.tar.bz2/77e626ad31433680c0a222069295d2ca/extundelete-0.2.4.tar.bz2 Resolving src.fedoraproject.org (src.fedoraproject.org)... 38.145.60.20, 38.145.60.21 Connecting to src.fedoraproject.org (src.fedoraproject.org)|38.145.60.20|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 108472 (106K) [application/x-bzip2] Saving to: ‘extundelete-0.2.4.tar.bz2' 100%[============================================================================>] 108,472 33.5KB/s in 3.2s 2021-11-28 18:36:20 (33.5 KB/s) - ‘extundelete-0.2.4.tar.bz2' saved [108472/108472] [root@VM-0-3-centos ~]# ls extundelete-0.2.4.tar.bz2
解壓extundelete源碼
[root@VM-0-3-centos ~]# tar -jxvf extundelete-0.2.4.tar.bz2 extundelete-0.2.4/ extundelete-0.2.4/acinclude.m4 extundelete-0.2.4/missing extundelete-0.2.4/autogen.sh extundelete-0.2.4/aclocal.m4 extundelete-0.2.4/configure extundelete-0.2.4/LICENSE extundelete-0.2.4/README extundelete-0.2.4/install-sh extundelete-0.2.4/config.h.in extundelete-0.2.4/src/ extundelete-0.2.4/src/extundelete.cc extundelete-0.2.4/src/block.h extundelete-0.2.4/src/kernel-jbd.h extundelete-0.2.4/src/insertionops.cc extundelete-0.2.4/src/block.c extundelete-0.2.4/src/cli.cc extundelete-0.2.4/src/extundelete-priv.h extundelete-0.2.4/src/extundelete.h extundelete-0.2.4/src/jfs_compat.h extundelete-0.2.4/src/Makefile.in extundelete-0.2.4/src/Makefile.am extundelete-0.2.4/configure.ac extundelete-0.2.4/depcomp extundelete-0.2.4/Makefile.in extundelete-0.2.4/Makefile.am [root@VM-0-3-centos ~]# cd extundelete-0.2.4/ [root@VM-0-3-centos extundelete-0.2.4]# ls acinclude.m4 aclocal.m4 autogen.sh config.h.in configure configure.ac depcomp install-sh LICENSE Makefile.am Makefile.in missing README src [root@VM-0-3-centos extundelete-0.2.4]#
編譯xtundelete源碼安裝
[root@VM-0-3-centos extundelete-0.2.4]# ./configure --prefix=/usr/local/extundelete && make && make install
Configuring extundelete 0.2.4
Writing generated files to disk
make -s all-recursive
Making all in src
extundelete.cc: In function ‘ext2_ino_t find_inode(ext2_filsys, ext2_filsys, ext2_inode*, std::string, int)':
extundelete.cc:1272:29: warning: narrowing conversion of ‘search_flags' from ‘int' to ‘ext2_ino_t {aka unsigned int}' inside { } [-Wnarrowing]
buf, match_name2, priv, 0};
^
Making install in src
/usr/bin/install -c extundelete '/usr/local/extundelete/bin'
[root@VM-0-3-centos extundelete-0.2.4]# which extundelete
/usr/bin/which: no extundelete in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin)
[root@VM-0-3-centos extundelete-0.2.4]# ll /usr/local/extundelete/bin/
total 1296
-rwxr-xr-x 1 root root 1323360 Nov 28 18:45 extundelete
如果在這一步報(bào)錯(cuò) configure: error: C++ compiler cannot create executables，可以運(yùn)行 yum -y install gcc-c++ 命令安裝編譯環(huán)境
準(zhǔn)備測試文件
[root@VM-0-3-centos examples]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on devtmpfs devtmpfs 930496 0 930496 0% /dev tmpfs tmpfs 941004 24 940980 1% /dev/shm tmpfs tmpfs 941004 508 940496 1% /run tmpfs tmpfs 941004 0 941004 0% /sys/fs/cgroup /dev/vda1 ext4 51473868 6465732 42685016 14% / /dev/loop0 iso9660 361650 361650 0 100% /mnt/iso tmpfs tmpfs 188204 0 188204 0% /run/user/0 [root@VM-0-3-centos examples]# cp ../extundelete-0.2.4.tar.bz2 . [root@VM-0-3-centos examples]# ls extundelete-0.2.4.tar.bz2
查詢文件的inode信息
我們選擇剛剛下載的extundelete源碼包作為“誤刪”的文件，先查看一下信息，-li 可以在第一列查看文件的inode信息，examples文件夾的inode值為1311798：
[root@VM-0-3-centos ~]# ls examples/ extundelete-0.2.4.tar.bz2 [root@VM-0-3-centos ~]# ls -li total 361676 1311798 drwxr-xr-x 2 root root 4096 Nov 28 20:28 examples 1310761 drwxr-xr-x 3 1000 1000 4096 Nov 28 18:45 extundelete-0.2.4 918157 drwxr-xr-x 2 root root 4096 Feb 28 2021 tarlist 396057 -rw-r--r-- 1 root root 370329600 Feb 27 2021 test.iso
刪除測試文件，并用查詢信息
[root@VM-0-3-centos ~]# cd examples/ [root@VM-0-3-centos examples]# ls extundelete-0.2.4.tar.bz2 [root@VM-0-3-centos examples]# rm extundelete-0.2.4.tar.bz2 -f [root@VM-0-3-centos examples]# ls [root@VM-0-3-centos examples]# /usr/local/extundelete/bin/extundelete /dev/vda1 --inode 1311798 NOTICE: Extended attributes are not restored. WARNING: EXT3_FEATURE_INCOMPAT_RECOVER is set. The partition should be unmounted to undelete any files without further data loss. If the partition is not currently mounted, this message indicates it was improperly unmounted, and you should run fsck before continuing. If you decide to continue, extundelete may overwrite some of the deleted files and make recovering those files impossible. You should unmount the file system and check it with fsck before using extundelete. Would you like to continue? (y/n) y Loading filesystem metadata ... 400 groups loaded. Group: 160 Contents of inode 1311798: 0000 | ed 41 00 00 00 10 00 00 7a 62 a3 61 1b 7a a3 61 | .A......zb.a.z.a 0010 | 1b 7a a3 61 00 00 00 00 00 00 02 00 08 00 00 00 | .z.a............ 0020 | 00 00 08 00 0b 00 00 00 0a f3 01 00 04 00 00 00 | ................ 0030 | 00 00 00 00 00 00 00 00 01 00 00 00 79 20 50 00 | ............y P. 0040 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 0050 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 0060 | 00 00 00 00 7c 63 ab ad 00 00 00 00 00 00 00 00 | ....|c.......... 0070 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 0080 | 1c 00 00 00 80 da 0d a3 80 da 0d a3 94 24 04 08 | .............$.. 0090 | 7a 62 a3 61 94 24 04 08 00 00 00 00 00 00 00 00 | zb.a.$.......... 00a0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 00b0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 00c0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 00d0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 00e0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ 00f0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................ Inode is Allocated File mode: 16877 Low 16 bits of Owner Uid: 0 Size in bytes: 4096 Access time: 1638097530 Creation time: 1638103579 Modification time: 1638103579 Deletion Time: 0 Low 16 bits of Group Id: 0 Links count: 2 Blocks count: 8 File flags: 524288 File version (for NFS): 2913690492 File ACL: 0 Directory ACL: 0 Fragment address: 0 Direct blocks: 127754, 4, 0, 0, 1, 5251193, 0, 0, 0, 0, 0, 0 Indirect block: 0 Double indirect block: 0 Triple indirect block: 0 File name | Inode number | Deleted status . 1311798 .. 393219 extundelete-0.2.4.tar.bz2 396764 Deleted conftest.err 1311833 Deleted [root@VM-0-3-centos examples]#
我們發(fā)現(xiàn) extundelete-0.2.4.tar.bz2 文件的狀態(tài)為 Deleted
使用extundelete恢復(fù)文件
[root@VM-0-3-centos ~]# /usr/local/extundelete/bin/extundelete /dev/vda1 --restore-directory /tmp NOTICE: Extended attributes are not restored. WARNING: EXT3_FEATURE_INCOMPAT_RECOVER is set. The partition should be unmounted to undelete any files without further data loss. If the partition is not currently mounted, this message indicates it was improperly unmounted, and you should run fsck before continuing. If you decide to continue, extundelete may overwrite some of the deleted files and make recovering those files impossible. You should unmount the file system and check it with fsck before using extundelete. Would you like to continue? (y/n) y Loading filesystem metadata ... 400 groups loaded. Loading journal descriptors ... 31842 descriptors loaded. *** Error in `/usr/local/extundelete/bin/extundelete': double free or corruption (!prev): 0x00000000014d6020 *** ======= Backtrace: ========= /lib64/libc.so.6(+0x81299)[0x7f5c08190299] /usr/local/extundelete/bin/extundelete[0x40cdcb] /usr/local/extundelete/bin/extundelete[0x40fee6] /usr/local/extundelete/bin/extundelete[0x4045b4] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f5c08131555] /usr/local/extundelete/bin/extundelete[0x404aef] ======= Memory map: ======== 00400000-0041c000 r-xp 00000000 fd:01 1311942 /usr/local/extundelete/bin/extundelete 0061c000-0061d000 r--p 0001c000 fd:01 1311942 /usr/local/extundelete/bin/extundelete 0061d000-0061e000 rw-p 0001d000 fd:01 1311942 /usr/local/extundelete/bin/extundelete 0061e000-0061f000 rw-p 00000000 00:00 0 014c6000-0176e000 rw-p 00000000 00:00 0 [heap] 7f5c00000000-7f5c00021000 rw-p 00000000 00:00 0 7f5c00021000-7f5c04000000 ---p 00000000 00:00 0 7f5c07ca1000-7f5c07ef3000 rw-p 00000000 00:00 0 7f5c07ef3000-7f5c07f0a000 r-xp 00000000 fd:01 265649 /usr/lib64/libpthread-2.17.so 7f5c07f0a000-7f5c08109000 ---p 00017000 fd:01 265649 /usr/lib64/libpthread-2.17.so 7f5c08109000-7f5c0810a000 r--p 00016000 fd:01 265649 /usr/lib64/libpthread-2.17.so 7f5c0810a000-7f5c0810b000 rw-p 00017000 fd:01 265649 /usr/lib64/libpthread-2.17.so 7f5c0810b000-7f5c0810f000 rw-p 00000000 00:00 0 7f5c0810f000-7f5c082d2000 r-xp 00000000 fd:01 265623 /usr/lib64/libc-2.17.so 7f5c082d2000-7f5c084d2000 ---p 001c3000 fd:01 265623 /usr/lib64/libc-2.17.so 7f5c084d2000-7f5c084d6000 r--p 001c3000 fd:01 265623 /usr/lib64/libc-2.17.so 7f5c084d6000-7f5c084d8000 rw-p 001c7000 fd:01 265623 /usr/lib64/libc-2.17.so 7f5c084d8000-7f5c084dd000 rw-p 00000000 00:00 0 7f5c084dd000-7f5c084f2000 r-xp 00000000 fd:01 291206 /usr/lib64/libgcc_s-4.8.5-20150702.so.1 7f5c084f2000-7f5c086f1000 ---p 00015000 fd:01 291206 /usr/lib64/libgcc_s-4.8.5-20150702.so.1 7f5c086f1000-7f5c086f2000 r--p 00014000 fd:01 291206 /usr/lib64/libgcc_s-4.8.5-20150702.so.1 7f5c086f2000-7f5c086f3000 rw-p 00015000 fd:01 291206 /usr/lib64/libgcc_s-4.8.5-20150702.so.1 7f5c086f3000-7f5c087f4000 r-xp 00000000 fd:01 287349 /usr/lib64/libm-2.17.so 7f5c087f4000-7f5c089f3000 ---p 00101000 fd:01 287349 /usr/lib64/libm-2.17.so 7f5c089f3000-7f5c089f4000 r--p 00100000 fd:01 287349 /usr/lib64/libm-2.17.so 7f5c089f4000-7f5c089f5000 rw-p 00101000 fd:01 287349 /usr/lib64/libm-2.17.so 7f5c089f5000-7f5c08ade000 r-xp 00000000 fd:01 266798 /usr/lib64/libstdc++.so.6.0.19 7f5c08ade000-7f5c08cde000 ---p 000e9000 fd:01 266798 /usr/lib64/libstdc++.so.6.0.19 7f5c08cde000-7f5c08ce6000 r--p 000e9000 fd:01 266798 /usr/lib64/libstdc++.so.6.0.19 7f5c08ce6000-7f5c08ce8000 rw-p 000f1000 fd:01 266798 /usr/lib64/libstdc++.so.6.0.19 7f5c08ce8000-7f5c08cfd000 rw-p 00000000 00:00 0 7f5c08cfd000-7f5c08d3f000 r-xp 00000000 fd:01 267873 /usr/lib64/libext2fs.so.2.4 7f5c08d3f000-7f5c08f3f000 ---p 00042000 fd:01 267873 /usr/lib64/libext2fs.so.2.4 7f5c08f3f000-7f5c08f40000 r--p 00042000 fd:01 267873 /usr/lib64/libext2fs.so.2.4 7f5c08f40000-7f5c08f42000 rw-p 00043000 fd:01 267873 /usr/lib64/libext2fs.so.2.4 7f5c08f42000-7f5c08f45000 r-xp 00000000 fd:01 265948 /usr/lib64/libcom_err.so.2.1 7f5c08f45000-7f5c09144000 ---p 00003000 fd:01 265948 /usr/lib64/libcom_err.so.2.1 7f5c09144000-7f5c09145000 r--p 00002000 fd:01 265948 /usr/lib64/libcom_err.so.2.1 7f5c09145000-7f5c09146000 rw-p 00003000 fd:01 265948 /usr/lib64/libcom_err.so.2.1 7f5c09146000-7f5c09168000 r-xp 00000000 fd:01 265614 /usr/lib64/ld-2.17.so 7f5c092b1000-7f5c0935d000 rw-p 00000000 00:00 0 7f5c09363000-7f5c09367000 rw-p 00000000 00:00 0 7f5c09367000-7f5c09368000 r--p 00021000 fd:01 265614 /usr/lib64/ld-2.17.so 7f5c09368000-7f5c09369000 rw-p 00022000 fd:01 265614 /usr/lib64/ld-2.17.so 7f5c09369000-7f5c0936a000 rw-p 00000000 00:00 0 7ffe581db000-7ffe581fc000 rw-p 00000000 00:00 0 [stack] 7ffe581fc000-7ffe581fe000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] Aborted [root@VM-0-3-centos ~]#
恢復(fù)失敗，此路不通！！！
有其他人成功了，但是我測試失敗，釋放內(nèi)存崩潰，有大神給說一下怎么改源碼嗎？此處存疑，后續(xù)再測，先記錄一下常用參數(shù)。
查詢inode文件狀態(tài)：/usr/local/extundelete/bin/extundelete /dev/vda1 --inode 1311798
恢復(fù)指定節(jié)點(diǎn)數(shù)據(jù)：/usr/local/extundelete/bin/extundelete /dev/vda1 --restore-inode 1311798
恢復(fù)單個(gè)文件：/usr/local/extundelete/bin/extundelete /dev/vda1 --restore-file root/examples/extundelete-0.2.4.tar.bz2
恢復(fù)一個(gè)目錄：/usr/local/extundelete/bin/extundelete /dev/vda1 --restore-files root/examples
恢復(fù)所有文件：/usr/local/extundelete/bin/extundelete /dev/vda1 --restore-all
預(yù)防誤刪引發(fā)的事故
定義別名，提示刪除
定義別名 alias rm='rm -i'， 在刪除文件前會出現(xiàn)一個(gè)提示，使用 -i 選項(xiàng)來需要逐個(gè)確認(rèn)要刪除的文件，只有用戶輸入 y 才會將文件刪除，但是這種做法在加上 -f 選項(xiàng)之后會失效。
禁用rm，使用mv代替
在系統(tǒng)中不允許直接使用rm命令直接刪除文件，需要mv文件到指定的回收目錄 /.delete，然后配合一個(gè)定時(shí)任務(wù)，每周清空/.delete下文件，相當(dāng)于手動創(chuàng)建了一個(gè)回收站。
總結(jié)
使用foremost恢復(fù)時(shí)的目標(biāo)目錄最好是另外一個(gè)磁盤中的目錄，把文件恢復(fù)到被刪除文件所在的磁盤中很可能會在恢復(fù)前覆蓋被誤刪的文件
sodu 的全稱目前有 substitute user do 和 super user do 兩種說法，使用sudo通常是行駛超級用戶的權(quán)限，但有時(shí)也可以其他普通用戶，所以翻譯成 substitute user do 代替其他用戶來做更準(zhǔn)確一點(diǎn)
foremost 支持的文件系統(tǒng)比較多，其中包括 ext2、 ext3 、vfat、NTFS、ufs、jfs 等，但是只能恢復(fù)特定格式的文件，而 extundelete 只支持ext3、ext4文件系統(tǒng)，不過可恢復(fù)的文件類型很多。
除了本文中總結(jié)的這兩款不怎么好用的恢復(fù)軟件，還有 testdisk 和 photorec 可以用來恢復(fù)，后續(xù)可以嘗試一下數(shù)據(jù)無價(jià)，請謹(jǐn)慎刪除，可參考別名方法或禁用 rm -rf 來減少事故的發(fā)生
原文鏈接：https://blog.csdn.net/albertsh/article/details/121599177
相關(guān)推薦
- 2022-04-25 jQuery利用鍵盤上下鍵移動表格內(nèi)容_jquery
- 2022-11-07 Pytest?fixture及conftest相關(guān)詳解_python
- 2022-04-18 WPF使用代碼創(chuàng)建數(shù)據(jù)模板DataTemplate_實(shí)用技巧
- 2022-11-21 詳解React獲取DOM和獲取組件實(shí)例的方式_React
- 2022-08-10 C#中通過Command模式實(shí)現(xiàn)Redo/Undo方案_C#教程
- 2022-02-17 Pytorch常用的對象類和繼承機(jī)制（如果有）
- 2022-09-10 Go語言中的IO操作及Flag包的用法_Golang
- 2023-07-15 element 確認(rèn)消息的使用步驟
- 最近更新
-
- window11 系統(tǒng)安裝 yarn
- 超詳細(xì)win安裝深度學(xué)習(xí)環(huán)境2025年最新版（
- Linux 中運(yùn)行的top命令 怎么退出？
- MySQL 中decimal 的用法？ 存儲小
- get 、set 、toString 方法的使
- @Resource和 @Autowired注解
- Java基礎(chǔ)操作-- 運(yùn)算符，流程控制 Flo
- 1. Int 和Integer 的區(qū)別，Jav
- spring @retryable不生效的一種
- Spring Security之認(rèn)證信息的處理
- Spring Security之認(rèn)證過濾器
- Spring Security概述快速入門
- Spring Security之配置體系
- 【SpringBoot】SpringCache
- Spring Security之基于方法配置權(quán)
- redisson分布式鎖中waittime的設(shè)
- maven:解決release錯(cuò)誤：Artif
- restTemplate使用總結(jié)
- Spring Security之安全異常處理
- MybatisPlus優(yōu)雅實(shí)現(xiàn)加密？
- Spring ioc容器與Bean的生命周期。
- 【探索SpringCloud】服務(wù)發(fā)現(xiàn)-Nac
- Spring Security之基于HttpR
- Redis 底層數(shù)據(jù)結(jié)構(gòu)-簡單動態(tài)字符串（SD
- arthas操作spring被代理目標(biāo)對象命令
- Spring中的單例模式應(yīng)用詳解
- 聊聊消息隊(duì)列，發(fā)送消息的4種方式
- bootspring第三方資源配置管理
- GIT同步修改后的遠(yuǎn)程分支
提供CDN加速