RAM root を見る

確認する。

標準ファームにrootでログイン

yasunari@qube:~$ ssh -l root qvl
root@LS-QVLF42:~#

initrd.buffalo の展開

root@LS-QVLF42:~# cd /boot
root@LS-QVLF42:/boot# ls
builddate.txt     initrd.buffalo    lost+found/       uImage.buffalo
conf_save.tgz     log.tgz           u-boot_lsqvl.bin
root@LS-QVLF42:/boot# dd if=initrd.buffalo of=initrd.gz bs=64 skip=1
150232+1 records in
150232+1 records out
root@LS-QVLF42:/boot# gunzip initrd.gz
root@LS-QVLF42:/boot# mkdir /tmp/root
root@LS-QVLF42:/boot# mount -o loop initrd /tmp/root
root@LS-QVLF42:/boot#

RAM root の散歩

root@LS-QVLF42:/boot# cd /tmp/root
root@LS-QVLF42:/tmp/root# ls
bin/        etc/        lost+found/ root/       share/      usr/
debugtool/  lib/        mnt/        rootfs/     sys/        var/
dev/        linuxrc*    proc/       sbin/       tmp/        www/
root@LS-QVLF42:/tmp/root/bin# ./busybox
BusyBox v1.7.0 (2009-04-29 19:12:57 JST) multi-call binary
Copyright (C) 1998-2006  妥rik Andersen, Rob Landley, and others.
Licensed under GPLv2.  帯ee source distribution for full notice.

Usage: busybox [function] [arguments]...
   or: [function] [arguments]...

        BusyBox is a multi-call binary that combines many common Unix
        utilities into a single executable.  Most people will create a
        link to busybox for each function they wish to use and BusyBox
        will act like whatever it was invoked as!

Currently defined functions:
        [, [[, addgroup, adduser, adjtimex, ar, arp, arping, ash,
        awk, basename, bunzip2, bzcat, cal, cat, catv, chattr,
        chgrp, chmod, chown, chpasswd, chpst, chroot, chrt, chvt,
        cksum, clear, cmp, comm, cp, cpio, crond, crontab, cryptpw,
        cut, date, dc, dd, deallocvt, delgroup, deluser, df, dhcprelay,
        diff, dirname, dmesg, dnsd, dos2unix, du, dumpkmap, dumpleases,
        echo, ed, egrep, eject, env, envdir, envuidgid, ether-wake,
        expand, expr, fakeidentd, false, fbset, fdflush, fdformat,
        fdisk, fgrep, find, fold, free, freeramdisk, fsck, fsck.minix,
        ftpget, ftpput, fuser, getopt, getty, grep, gunzip, gzip,
        halt, hdparm, head, hexdump, hostid, hostname, httpd,
        hwclock, id, ifconfig, ifdown, ifup, inetd, init, insmod,
        install, ip, ipaddr, ipcalc, ipcrm, ipcs, iplink, iproute,
        iprule, iptunnel, kill, killall, killall5, klogd, last,
        length, less, linux32, linux64, linuxrc, ln, loadfont,
        loadkmap, logger, login, logname, logread, losetup, ls,
        lsattr, lsmod, lzmacat, makedevs, md5sum, mdev, mesg,
        mkdir, mkfifo, mkfs.minix, mknod, mkswap, mktemp, modprobe,
        more, mount, mountpoint, mt, mv, nameif, nc, netstat,
        nice, nmeter, nohup, nslookup, od, openvt, passwd, patch,
        pidof, ping, ping6, pipe_progress, pivot_root, poweroff,
        printenv, printf, ps, pscan, pwd, raidautorun, rdate,
        readahead, readlink, readprofile, realpath, reboot, renice,
        reset, resize, rm, rmdir, rmmod, route, rpm, rpm2cpio,
        run-parts, runlevel, runsv, runsvdir, rx, sed, seq, setarch,
        setconsole, setkeycodes, setlogcons, setsid, setuidgid,
        sh, sha1sum, slattach, sleep, softlimit, sort, split,
        start-stop-daemon, stat, strings, stty, su, sulogin, sum,
        sv, svlogd, swapoff, swapon, switch_root, sync, sysctl,
        syslogd, tail, tar, taskset, tcpsvd, tee, telnet, test,
        tftp, time, top, touch, tr, traceroute, true, tty, ttysize,
        udhcpc, udhcpd, udpsvd, umount, uname, uncompress, unexpand,
        uniq, unix2dos, unlzma, unzip, uptime, usleep, uudecode,
        uuencode, vconfig, vi, vlock, watch, watchdog, wc, wget,
        which, who, whoami, xargs, yes, zcat, zcip

root@LS-QVLF42:/tmp/root/bin#

さて、、

後始末

root@LS-QVLF42:/tmp/root# cd /
root@LS-QVLF42:/# umount /tmp/root
root@LS-QVLF42:/# cd /boot
root@LS-QVLF42:/boot# ls
builddate.txt     initrd            log.tgz           u-boot_lsqvl.bin
conf_save.tgz     initrd.buffalo    lost+found/       uImage.buffalo
root@LS-QVLF42:/boot# rm initrd
root@LS-QVLF42:/boot#

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