利用BusyBox ~私人定制 My LINUX~

# fdisk /dev/sdb n p 1  +50M n p 2  +512M n p 3  +256M t 3 82 w # mke2fs -t etx4 /dev/sdb1 # mke2fs -t etx4 /dev/sdb2 # mkswap /dev/sdb3 # mkdir -pv /mnt/{boot,sysroot} # mount /dev/sdb1 /mnt/boot # mount /dev/sdb2 /mnt/sysroot

# tar xf linux-3.13.6.tar.xz -C /usr/src/ # cd /usr/src # ln -sv linux-3.13.6 linux # cd linux # make allnoconfig # make menuconfig 把我们所需要的内容整合进来

[*]64-bit kernel ：64位操作系统的内核 General setup --> Local version --> -MyLinux: 给内核定一个自己的版本 Processor type and features --> Processor family --> (X)Generic-x86-64：这里是CPU类型、这个是通用x86-64 [*]Symmetric multi-processing support：选择CPU支持多核心处理 [*]Enable loadable module support:选择内核动态模块加载 Bus options (PCI etc.) --> [*]PCI suppor：支持PCI总线 Device Drivers --> <*>SCSI device support -->[*]SCSI disk support要支持SCSI硬盘 Device Drivers -->Fusion MPT device support (NEW) --> <*>Fusion MPT ScsiHost drivers for SPI、<*>Fusion MPT misc device (ioctl) driver、[*]Fusion MPT logging facility：支持对硬盘的驱动 File systems --> <*>The Extended 4 (ext4) filesystem：支持文件系统 Executable file formats / Emulations --> [*]Kernel support for ELF binaries、[*]Write ELF core dumps with partial segments (NEW)、 <*>Kernel support for scripts starting with #!:可执行文件的格式 Device Drivers -->Input device support --> [*]Keyboards -> <*>AT keyboard (NEW) [*]Mice：支持输入输出设备、比如健盘 Device Drivers > USB support  > <*>UHCI HCD (most Intel and VIA) support、<*>OHCI HCD (USB 1.1) support、<*>EHCI HCD (USB 2.0) support:USB设备驱动 Device Drivers > Generic Driver Options > [*] Maintain a devtmpfs filesystem to mount at /dev [*]Automount devtmpfs at /dev, after the kernel mounted the rootfs Networking support > Networking options[*] TCP/IP networking [*]IP:multicasting [*]IP: advanced router[*]IP: policy routing [*]IP: verbose route monitoring[*]   IP: kernel level autoconfiguration[*]IP: DHCP support[*]IP: BOOTP support[*]     IP: RARP support<*>IP: tunneling <*>Unix domain sockets<*> UNIX: socket monitoring interface：支持协议 Device Drivers > Network device support > Ethernet driver support[*]Intel devices (NEW)<*>Intel(R) PRO/1000 Gigabit Ethernet support<*>Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support：只要Intel的、其他的他都去掉、这是选择网卡设备的驱动程序 [ ]Wireless：这个无线网、我们去掉去、用不着

# cp .config /root/config-3.13.6-x86_64 # make bzImage # cp arch/x86/boot/bzImage /mnt/boot/ # grub-install --root-directory=/mnt /dev/sdb

BusyBox 的诞生

grep

find

BusyBox 编译选项

help

defconfig

allnoconfig

allyesconfig

allbareconfig

config

menuconfig

all

busybox

clean

distclean

sizes

make

$ make allyesconfig $ make

# yum -y install libmcrypt-devel # rpm --install glibc-static-2.12-1.132.el6.x86_64.rpm # tar xf busybox-1.22.1.tar.bz2 # cd busybox-1.22.1 # make menuconfig # make # make install

# cp -a _install/* /mnt/sysroot/ # cd /mnt/sysroot/ # mkdir -pv /etc/rc.d var/log root home lib lib64 dev proc sys boot mnt media tmp srv 给grub提供一个配置文件 # vim /mnt/boot/grub/grub.conf default=0 timeout=5 title Mini Linux (3.13.6-MyLinux) root (hd0,0) kernel /bzImage ro root=/dev/sda2 init=/sbin/init

# vim /mnt/sysroot/etc/fstab /dev/sda1       /boot   ext4    defaults        0 0 proc /proc   proc    defaults        0 0 sysfs /sys    sysfs   defaults        0 0
/dev/sda2       /       ext4    defaults        0 0
/dev/sda3       swap    swap    defaults        0 0

#!/bin/sh # 打印系统启动时的欢迎信息 echo -e "\tWecome to \033[34mMini\033[0m Linux" 判断/etc/sysroot/network是否存在并且可读、条件成立就source进来 [ -r /etc/sysconfig/network ] && . /etc/sysconfig/network 判断$HOSTNAME是否为空并且$HOSTNAME==NONE、如果为空就给个默认值 [ -z "$HOSTNAME" -o "$HOSTNAME" == "(none)" ] && HOSTNAME=localhost 给HOSTNAME赋值为定义好的HOSTNAME的值 /bin/hostname $HOSTNAME 挂载文件系统 echo "mounting proc filesystem..."
mount -t proc proc /proc echo "mounting sysfs filesystem..."
mount -t sysfs sysfs /sys 自动探测各硬件设备、并且能够探测到的都装载设备文件 mdev -s 给系统配置一个IP地址 ifconfig lo 127.0.0.1
ifconfig eth0 172.16.254.188
mount -a mkdir /dev/pts mount -t devpts devpts /dev/pts

::sysinit:/etc/rc.d/rc.sysinit 明确指定要找/etc/rc.d/rc.sysinit文件 ::respawn:/sbin/getty 19200 tty1 ::respawn:/sbin/getty 19200 tty2 ::respawn:/sbin/getty 19200 tty3 ::respawn:/sbin/getty 19200 tty4 ::respawn:/sbin/getty 19200 tty5 ::respawn:/sbin/getty 19200 tty6 ：19200表示每秒钟传输的速率、getty是一个串型终端、他会调用一个登录界面让用户输入登录信息进行验证 tty6::askfirst:/bin/sh 启用6个虚拟终端 console::respawn:-/bin/sh 启用一个终端，如果出错重新启动respawn、-表示敲一回车才可以启用sh ::ctrlaltdel:/sbin/reboot 定义组合键、按ctrl+alt+del就reboot ::shutdown:/bin/umount -a -r 如果要要关机就卸载已挂载的设备、然后关机

# useradd busybox # passwd busybox 密码也设置为：busybox # head -1 /etc/passwd > /mnt/sysroot/etc/passwd # tail -1 /etc/passwd >> /mnt/sysroot/etc/passwd # vim /mnt/sysroot/etc/passwd root:x:0:0:root:/root:/bin/sh busybox:x:502:503::/home/busybox:/bin/sh # head -1 /etc/group > /mnt/sysroot/etc/group # tail -1 /etc/group >> /mnt/sysroot/etc/group # head -1 /etc/shadow > /mnt/sysroot/etc/shadow # tail -1 /etc/shadow >> /mnt/sysroot/etc/shadow # cat /mnt/sysroot/etc/shadow 提供一个登录欢迎信息、创建一个issue文件 # vim /mnt/sysroot/etc/issue MyLinux is CentOS release 6.5 Kernel \r on an \m 提供主机名 # mkdir /mnt/sysroot/etc/sysconfig # vim /mnt/sysroot/etc/sysconfig/network HOSTNAME=mylinux.tanxw.com 提供命令提示符和环境变量 # vim /mnt/sysroot/etc/profile export PS1='[\u@\h \A \W]\$ ' PATH="/usr/local/sbin:/usr/local/bin:/sbin/:/bin:/usr/sbin:/usr/bin:$PATH" # chmod +x /mnt/sysroot/etc/rc.d/rc.sysinit # sync  同步数据到磁盘中去

# tar xf dropbear-2013.58.tar.bz2 # cd dropbear-2013.58 # ./configure # make # make PROGRAMS="dropbear dbclient dropbearkey dropbearconvert scp" install # mkdir /etc/dropbear 生成两个密钥文件 # dropbearkey -t rsa -s 1024 -f /etc/dropbear/dropbear_rsa_host_key # dropbearkey -t dss -f /etc/dropbear/dropbear_dss_host_key 验证一下生的这两个文件 # ls /etc/dropbear

#!/bin/bash # # description: dropbear ssh daemon # chkconfig: 2345 66 33 # dsskey=/etc/dropbear/dropbear_dss_host_key rsakey=/etc/dropbear/dropbear_rsa_host_key lockfile=/var/lock/subsys/dropbear pidfile=/var/run/dropbear.pid dropbear=/usr/local/sbin/dropbear dropbearkey=/usr/local/bin/dropbearkey [ -r /etc/rc.d/init.d/functions ] && . /etc/rc.d/init.d/functions [ -r /etc/sysconfig/dropbear ] && . /etc/sysconfig/dropbear keysize=${keysize:-1024} port=${port:-22} gendsskey() { [ -d /etc/dropbear ] || mkdir /etc/dropbear echo -n "Starting generate the dss key: " $dropbearkey -t dss -f $dsskey &> /dev/null RETVAL=$?
if [ $RETVAL -eq 0 ]; then success echo return 0
else failure echo return 1
fi } genrsakey() { [ -d /etc/dropbear ] || mkdir /etc/dropbear echo -n "Starting generate the rsa key: " $dropbearkey -t rsa -s $keysize -f $rsakey &> /dev/null RETVAL=$?
if [ $RETVAL -eq 0 ]; then success echo return 0
else failure echo return 1
fi } start() { [ -e $dsskey ] || gendsskey [ -e $rsakey ] || genrsakey if [ -e $lockfile ]; then
echo -n "dropbear daemon is already running: " success echo exit 0
fi
echo -n "Starting dropbear: " daemon --pidfile="$pidfile" $dropbear -p $port -d $dsskey -r $rsakey RETVAL=$?
echo
if [ $RETVAL -eq 0 ]; then
touch $lockfile return 0
else
rm -f $lockfile $pidfile return 1
fi } stop() { if [ ! -e $lockfile ]; then
echo -n "dropbear service is stopped: " success echo exit 1
fi
echo -n "Stopping dropbear daemon: " killproc dropbear RETVAL=$?
echo
if [ $RETVAL -eq 0 ]; then
rm -f $lockfile $pidfile return 0
else return 1
fi } status() { if [ -e $lockfile ]; then
echo "dropbear is running..."
else
echo "dropbear is stopped..."
fi } usage() { echo "Usage: dropbear {start|stop|restart|status|gendsskey|genrsakey}" } case $1 in start) start ;; stop) stop ;; restart) stop start ;; status) status ;; gendsskey) gendsskey ;; genrsakey) genrsakey ;; *) usage ;; esac

keysize=2048 port=22022 # chmod +x /etc/rc.d/init.d/dropbear # chkconfig --add dropbear # vim /etc/profile.d/dropbear.sh export PATH=/usr/local/sbin:$PATH 启动服务并查看端口22022是否已经处于监听状态、并在本地尝试连接登录： # service dropbear start # ss -tnl

#!/bin/bash # dirPath=/mnt/sysroot clearcmd(){ if which $1 &> /dev/null;then cmdPath=`which --skip-alias $1` else
echo "Command not exist!" return 4
fi } cpCmd(){ dirName=`dirname $1` [ -d ${dirPath}${dirName} ] || mkdir -p ${dirPath}${dirName} [ -f ${dirPath}${cmdPath} ] || cp $1 ${dirPath}${dirName} } cpLib(){ for i in `ldd $1 | grep -o "/[^[:space:]]\{1,\}"`;do dirLib=`dirname $i` [ -d ${dirPath}${dirLib} ] || mkdir -p ${dirPath}${dirLib} [ -f ${dirPath}$i ] || cp $i ${dirPath}${dirLib} done } while true;do read -p "Enter a command:" cmd if [ "$cmd" == 'quit' ];then
echo "quit!" exit 0
fi clearcmd $cmd [ $? -eq 4 ] && continue cpCmd $cmdPath cpLib $cmdPath done

# mkdir /mnt/sysroot/etc/dropbear # dropbearkey -t rsa -s 1024 -f /mnt/sysroot/etc/dropbear/dropbear_rsa_host_key # dropbearkey -t dss -f /mnt/sysroot/etc/dropbear/dropbear_dss_host_key

# cp -d /lib64/libnss_files* /mnt/sysroot/lib64 # cp -d /usr/lib64/libnss3.so /mnt/sysroot/usr/lib64/ # cp -d /usr/lib64/libnss_files.so /mnt/sysroot/usr/lib64/ # cp /etc/nsswitch.conf /mnt/sysroot/etc/ # vim /mnt/sysroot/etc/nsswitch.conf 只保留以下几项、其他的都不需要： passwd: files shadow: files group: files hosts: files dns

# vim /etc/shells /bin/sh
/bin/hush /bin/ash /sbin/nologin /bin/bash

# vim /mnt/sysroot/etc/fstab 加一行 devpts /dev/pts        devpts  defaults        0 0 再创建/dev/pts这个目录： # mkdri /mnt/sysroot/etc/profile.d # cp /etc/profile.d/dropbear.sh /mnt/sysroot/etc/profile.d/ # mkdir /mnt/sysroot/dev/pts # sync

# yum -y install pcre-devel # tar xf nginx-1.4.2.tar.bz # cd nginx-1.4.2 # ./configure --prefix=/usr/local --conf-path=/etc/nginx/nginx.cnf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --user=nginx --group=nginx --without-pcre --without-http_rewrite_module --without-http_geo_module --without-http_uwsgi_module --without-http_fastcgi_module --without-http_scgi_module --without-http_memcached_module --prefix=/usr/local:指定第三方软件安装目录 --conf-path=/etc/nginx/nginx.cnf：指定主配置文件的路径 --error-log-path=/var/log/nginx/error.log：指定错误日志存放路径 --http-log-path=/var/log/nginx/access.log：指定访问日志 --group=nginx：以nginx用户身份运行、反正不要以管理员的身份去运行 --group=nginx：nginx用户组 其他的选项都是nginx默认选项、我们都去掉 # make # make install # useradd nginx # cd /usr/local/sbin # ./nginx # ss -tnl 查看80端口是否已经处于监听状态

# cp /etc/nginx/ /mnt/sysroot/etc/ -r # grep "^nginx" /etc/passwd >> /mnt/sysroot/etc/passwd # grep "^nginx" /etc/group >> /mnt/sysroot/etc/group # grep "^nginx" /etc/shadow >> /mnt/sysroot/etc/shadow # mkdir /mnt/sysroot/usr/local/html # vim /usr/loca/html/index.html <h2>Wecome to Nginx</h2>
<h3>This is MyLinux</h3>

#!/bin/sh # # nginx - this script starts and stops the nginx daemon # # chkconfig: - 85 15 # description: Nginx is an HTTP(S) server, HTTP(S) reverse \ # proxy and IMAP/POP3 proxy server # processname: nginx # config: /etc/nginx/nginx.conf # config: /etc/sysconfig/nginx # pidfile: /var/run/nginx.pid # Source function library. . /etc/rc.d/init.d/functions # Source networking configuration. . /etc/sysconfig/network # Check that networking is up. [ "$NETWORKING" = "no" ] && exit 0 nginx="/usr/local/sbin/nginx" prog=$(basename $nginx) NGINX_CONF_FILE="/etc/nginx/nginx.conf" [ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx lockfile=/var/lock/subsys/nginx make_dirs() { # make required directories user=`nginx -V 2>&1 | grep "configure arguments:" | sed 's/[^*]*--user=\([^ ]*\).*/\1/g' -` options=`$nginx -V 2>&1 | grep 'configure arguments:'` for opt in $options; do
if [ `echo $opt | grep '.*-temp-path'` ]; then value=`echo $opt | cut -d "=" -f 2` if [ ! -d "$value" ]; then # echo "creating" $value mkdir -p $value && chown -R $user $value fi
fi
done } start() { [ -x $nginx ] || exit 5 [ -f $NGINX_CONF_FILE ] || exit 6 make_dirs echo -n $"Starting $prog: " daemon $nginx -c $NGINX_CONF_FILE retval=$?
echo [ $retval -eq 0 ] && touch $lockfile return $retval } stop() { echo -n $"Stopping $prog: " killproc $prog -QUIT retval=$?
echo [ $retval -eq 0 ] && rm -f $lockfile return $retval } restart() { configtest || return $? stop sleep 1 start } reload() { configtest || return $?
echo -n $"Reloading $prog: " killproc $nginx -HUP RETVAL=$?
echo } force_reload() { restart } configtest() { $nginx -t -c $NGINX_CONF_FILE } rh_status() { status $prog } rh_status_q() { rh_status >/dev/null 2>&1 } case "$1" in start) rh_status_q && exit 0 $1 ;; stop) rh_status_q || exit 0 $1 ;; restart|configtest) $1 ;; reload) rh_status_q || exit 7 $1 ;; force-reload) force_reload ;; status) rh_status ;; condrestart|try-restart) rh_status_q || exit 0 ;; *) echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}" exit 2
esac

# mkdir /mnt/sysroot/var/log/nginx # mkdir /mnt/sysroot/usr/local/logs # mkdir -pv /mnt/sysroot/var/lock/subsys # chmod +x /mnt/sysroot/var/log/nginx # chmod +x /mnt/sysroot/tmp/ # sync