海运的博客

修改~/.bashrc添加：

shopt -s histappend
#PROMPT_COMMAND="history -a; history -c; history -r; $PROMPT_COMMAND"
PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND$'\n'}history -a; history -c; history -r"

https://unix.stackexchange.com/questions/1288/preserve-bash-history-in-multiple-terminal-windows

登录ssh时将agent sock链接到固定文件：

cat << EOF > ~/.ssh/rc 
#!/bin/bash
if [ -S "\$SSH_AUTH_SOCK" ]; then
    ln -sf \$SSH_AUTH_SOCK ~/.ssh/ssh_auth_sock
fi
EOF
chmod +x ~/.ssh/rc 

tmux更新SSH_AUTH_SOCK变量：

cat << EOF >> ~/.tmux.conf 
#先删除SSH_AUTH_SOCK变量，不然设置无效
set -g -u update-environment[3]
setenv -g 'SSH_AUTH_SOCK' ~/.ssh/ssh_auth_sock
EOF

dropbear可使用此方法：

alias ssh='[ -n "$TMUX" ] && [ -n $SSH_AUTH_SOCK ] && eval $(tmux showenv -s SSH_AUTH_SOCK); /usr/bin/ssh'
alias scp='[ -n "$TMUX" ] && [ -n $SSH_AUTH_SOCK ] && eval $(tmux showenv -s SSH_AUTH_SOCK); /usr/bin/scp'

https://stackoverflow.com/questions/21378569/how-to-auto-update-ssh-agent-environment-variables-when-attaching-to-existing-tm

下载mips musl交叉编译环境，也可以使用https://toolchains.bootlin.com/。

wget https://musl.cc/mips-linux-musl-cross.tgz
tar zxf mips-linux-musl-cross.tgz
export PATH=$PATH:`pwd`/mips-linux-musl-cross/bin/

编译ncurses，后续要将/lib/terminfo/x/xterm-256color等复制到目标机器/data/terminfo目录，不然运行tmux提示找不到terminfo database。

wget https://ftp.gnu.org/pub/gnu/ncurses/ncurses-6.4.tar.gz
tar zxf ncurses-6.4.tar.gz
cd ncurses-6.4/
./configure --prefix /usr/local/tmux --with-default-terminfo-dir=/data/terminfo --enable-pc-files --host=mips-linux-musl
#解决错误:strip: Unable to recognise the format of the input file `/usr/local/tmux/bin/tic'
ln -s `pwd`/../mips-linux-musl-cross/bin/mips-linux-musl-strip /usr/local/bin/strip
make && make install
rm -rf /usr/local/bin/strip

编译libevent和tmux：

wget https://github.com/libevent/libevent/releases/download/release-2.1.12-stable/libevent-2.1.12-stable.tar.gz
tar zxf libevent-2.1.12-stable.tar.gz 
cd libevent-2.1.12-stable/
./configure --prefix /usr/local/tmux --host=mips-linux-musl --disable-openssl
make && make install

wget https://github.com/tmux/tmux/releases/download/3.3a/tmux-3.3a.tar.gz
tar zxf tmux-3.3a.tar.gz 
cd tmux-3.3a/
export CFLAGS="-I/usr/local/tmux/include -I/usr/local/tmux/include/ncurses"
export LDFLAGS="-L/usr/local/tmux/lib"
./configure --enable-static --prefix=/usr/local/tmux --host=mips-linux-musl
make && make install

静态编译dropbear，当前最新版本使用SRT关闭窗口后dropbear和执行的命令一直在后台不结束，使用dropbear-2020.81版本正常。

wget https://github.com/mkj/dropbear/archive/refs/tags/DROPBEAR_2020.81.tar.gz
tar zxf DROPBEAR_2020.81.tar.gz 
cd dropbear-DROPBEAR_2020.81/
#老版本没有configure使用autoconf生成
./configure --enable-static --prefix=/usr/local/dropbear --host=mips-linux-musl --disable-zlib --disable-syslog --disable-harden --disable-lastlog --disable-utmp --disable-utmpx --disable-wtmp --disable-wtmpx --disable-pututline --disable-pututxline --disable-loginfunc 
PROGRAMS="dropbear dbclient dropbearkey dropbearconvert scp" MULTI=1 make strip

编译前可修改default_options.h定义dropbear运行时的PATH用来查找scp执行文件，sftp-server执行文件路径使用SFTP。

#define SFTPSERVER_PATH "/data/bin/sftp-server"
#define DROPBEAR_PATH_SSH_PROGRAM "/data/bin/dbclient"
#define DEFAULT_ROOT_PATH "/usr/sbin:/usr/bin:/sbin:/bin:/data/bin"
#define DEFAULT_PATH "/usr/bin:/bin:/data/bin"

编译的为单个文件dropbearmulti，使用时创建软链接：

ln -s /data/bin/dropbearmulti /data/bin/dropbear
ln -s /data/bin/dropbearmulti /data/bin/dropbearkey 
ln -s /data/bin/dropbearmulti /data/bin/scp     

使用：

mkdir /etc/dropbear/
./dropbearkey -t ecdsa -s 256 -f /etc/dropbear/dropbear_ecdsa_host_key
./dropbearkey -t ed25519 -f /etc/dropbear/dropbear_ed25519_host_key
./dropbearkey -t dss -f /etc/dropbear/dropbear_dss_host_key
./dropbearkey -t rsa -s 3072 -f /etc/dropbear/dropbear_rsa_host_key
./dropbear -r /etc/dropbear/dropbear_rsa_host_key

静态编译openssl/openssh/sshd：

wget https://github.com/madler/zlib/releases/download/v1.2.13/zlib-1.2.13.tar.gz
tar zxf zlib-1.2.13.tar.gz 
cd zlib-1.2.13/
CC=mips-linux-musl-gcc  ./configure --prefix=/usr/local/openssh --static 
make && make install

wget https://github.com/openssl/openssl/releases/download/OpenSSL_1_1_1t/openssl-1.1.1t.tar.gz
tar zxf openssl-1.1.1t.tar.gz 
cd openssl-1.1.1t
#./config no-asm no-shared --prefix=/usr/local/openssh --cross-compile-prefix=mips-linux-musl-
#sed -i 's/-m64//g' Makefile
./Configure linux-mips32 no-asm no-shared --prefix=/usr/local/openssh --cross-compile-prefix=mips-linux-musl-
make && make install

export CFLAGS="-I/usr/local/openssh/include/"
export LDFLAGS="-L/usr/local/openssh/lib/"
wget https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-9.3p1.tar.gz
tar zxf openssh-9.3p1.tar.gz 
cd openssh-9.3p1/
./configure --prefix=/usr/local/openssh --host=mips-linux-musl --with-ldflags=-static --disable-lastlog --disable-utmp  --disable-utmpx --disable-wtmp  --disable-wtmpx --disable-libutil --disable-pututline --disable-pututxline --with-default-path=/usr/bin:/bin:/usr/sbin:/sbin:/sbin:/usr/sbin:/bin:/usr/bin:/data/bin
make && make install

使用：

mkdir /etc/ssh
ssh-keygen -A
cat <<EOF > /etc/ssh/sshd.conf
Port 22
PermitRootLogin yes
ChallengeResponseAuthentication no
Subsystem       sftp    /data/bin/sftp-server

PubkeyAuthentication yes

HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
EOF

/src/openssh-9.3p1/sshd -f /etc/ssh/sshd.conf

静态编译bash:

wget https://ftp.gnu.org/gnu/bash/bash-5.1.tar.gz
tar zxf bash-5.1.tar.gz 
cd bash-5.1/
./configure --enable-static-link --host=mips-linux-musl --without-bash-malloc
make
mips-linux-musl-strip -s bash

静态编译iperf3：

wget https://github.com/esnet/iperf/releases/download/3.15/iperf-3.15.tar.gz
tar zxf iperf-3.15.tar.gz 
cd iperf-3.15/
./configure --prefix=/usr/local/iperf3 --host=mips-linux-musl "LDFLAGS=--static" --disable-shared 
make

静态编译dnsmasq:

wget https://thekelleys.org.uk/dnsmasq/dnsmasq-2.89.tar.gz
tar zxf dnsmasq-2.89.tar.gz 
cd dnsmasq-2.89/
CC=mips-linux-musl-gcc make CFLAGS=-Os LDFLAGS=-static

EcoNet EN751221 SOC MIPS 34Kc uclibc编译vnstat:

#gcc版本太高vnstat编译失败,由于目标是uclibc，使用上面的musl编译后不能运行
wget https://toolchains.bootlin.com/downloads/releases/toolchains/mips32/tarballs/mips32--uclibc--stable-2022.08-1.tar.bz2
tar jxf mips32--uclibc--stable-2022.08-1.tar.bz2
export PATH=$PATH:`pwd`/mips32--uclibc--stable-2022.08-1/bin/

wget https://www.sqlite.org/2025/sqlite-autoconf-3490100.tar.gz
tar zxf sqlite-autoconf-3490100.tar.gz 
cd sqlite-autoconf-3490100/
./configure --host=mips-linux --disable-shared --enable-static --prefix=/usr/local/sqlite
make && make install
  
cd ../
wget https://humdi.net/vnstat/vnstat-2.13.tar.gz
tar zxf vnstat-2.13.tar.gz 
cd vnstat-2.13/
CPPFLAGS="-I/usr/local/sqlite/include/" LDFLAGS="-L/usr/local/sqlite/lib/ -static" ./configure --host=mips-linux --disable-shared --enable-static --prefix=/usr/local/vnstat
make && make install

编译aarch64版本coreutils，内核版本4.1.52：

wget https://toolchains.bootlin.com/downloads/releases/toolchains/aarch64/tarballs/aarch64--glibc--stable-2018.11-1.tar.bz2
tar jxf aarch64--glibc--stable-2018.11-1.tar.bz2 
export PATH=$PATH:`pwd`/aarch64--glibc--stable-2018.11-1/bin/

wget http://ftp.gnu.org/gnu/coreutils/coreutils-8.30.tar.xz
tar Jxf coreutils-8.30.tar.xz 
cd coreutils-8.30/
./configure --host=aarch64-linux --prefix=/usr/local/coreutils

加入rc.local，设置home目录，不然进入tmux时进行和home相关的操作时提示$HOME未设定，同时一些和$HOME相关的调用也不正常，如vim配置文件不加载。

export HOME=/root 
tmux new -s name -d "cmd"
tmux neww -t name -d "cmd"

或先新建窗口再执行命令：

tmux new -n window1 -s sess -d
tmux send -t "sess:window1" "top" Enter
tmux neww -n window2 -t sess
tmux send -t "sess:window2" "top" Enter

安装debootstrap和qemu-user-static：

apt install apt-transport-https qemu qemu-user-static binfmt-support debootstrap

构建ubuntu 18.04系统，基础包为minbase，使用清大的源：

qemu-debootstrap --arch arm64 --variant=minbase --include=whiptail,ca-certificates,tzdata bionic rootfs http://mirrors.ustc.edu.cn/ubuntu-ports/

配置软件源：

cat > rootfs/etc/apt/sources.list <<EOF
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse
EOF

配置网络信息：

mkdir rootfs/etc/network/ 
echo 'nameserver 192.168.168.1' > rootfs/etc/resolv.conf
echo 'ubuntu-18.04' > rootfs/etc/hostname
cat > rootfs/etc/netplan/50-cloud-init.yaml <<EOF
network:
    ethernets:
        eth0:
            addresses:
            - 192.168.168.6/24
            dhcp4: false
            gateway4: 192.168.168.1
            nameservers:
                addresses:
                - 192.168.168.1
                search: []
    version: 2
EOF

挂载本地设备文件到rootfs：

mount -t proc /proc  rootfs/proc 
mount -t sysfs /sys  rootfs/sys 
mount -o bind /dev  rootfs/dev 
mount -o bind /dev/pts  rootfs/dev/pts 

chroot rootfs内配置：

LANG=C.UTF-8 chroot rootfs/  /bin/bash

在rootfs内执行：

cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
apt update
apt upgrade
apt install systemd -y 
apt install wireless-regdb crda -y
apt install rsyslog udev dbus kmod openssh-server netplan.io man vim wget net-tools sysstat tmux less wireless-regdb crda dosfstools parted rng-tools -y
echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config
passwd root
umount /dev/pts/ /dev/ /proc/ /sys 
exit

为方便使用之前编译的内核和armbian的uInitrd、firmware文件，挂载armbian的img镜像到本地：

losetup -P -f --show Armbian_5.62_Aml-s9xxx_Ubuntu_bionic_default_4.18.7_20181012.img
mount /dev/loop3p2 /mnt
mount /dev/loop3p2 /mnt/boot
mv /mnt/boot/* rootfs/boot/
mv /mnt/lib/modules/ rootfs/lib/
#也可安装armbian的firmware-aml-4.18-20181011_5.62_arm64.deb
mv /mnt/lib/firmware/ rootfs/lib/
mv /mnt/etc/modprobe.d/ rootfs/etc/
mv /mnt/etc/fstab rootfs/etc/
mv /mnt/root/install.sh rootfs/root/

将armbain镜像内的文件全部删除，将新做的系统移动过去。

rm -rf /mnt/*
mv rootfs/boot/* /mnt/boot/
mv rootfs/* /mnt/

参考：
https://help.ubuntu.com/lts/installation-guide/s390x/apds04.html