创建与主系统分离的独立的运行环境

chroot命令的主要作用是提供一个隔离的环境，使得在该环境下运行的进程无法访问到主系统的文件和目录。这样可以增加系统的安全性，防止进程对系统进行非法操作或者破坏。

一、基础环境

二、创建账号

三、配置SSHD

四、权限配置

五、bug fix

六、其他说明

①　查找命令在系统中的实际位置，并拷贝到bin或者sbin目录下【指的是copy到chroot的bin或者sbin目录】
②　用ldd命令查找出命令运行时所依赖的共享包
③　把这些共享包拷贝到lib64下
4️⃣　下面的示例参考：

cd /data/chroot/bin \cp /usr/bin/ls . chroot=/data/chroot ldd /usr/bin/ls for i in `ldd /usr/bin/ls | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/bin/ls | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done \cp /usr/sbin/ping . \cp /usr/sbin/arp /data/chroot/bin/ \cp /usr/sbin/ip /data/chroot/bin/ \cp /usr/bin/netstat /data/chroot/bin/ \cp /usr/sbin/route /data/chroot/bin/ \cp /usr/sbin/ifconfig /data/chroot/bin/ \cp /usr/bin/echo /data/chroot/bin/ ldd /usr/sbin/ping for i in `ldd /usr/sbin/ping | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/ping | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/arp for i in `ldd /usr/sbin/arp | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/arp | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/bin/netstat for i in `ldd /usr/bin/netstat | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/bin/netstat | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/ip for i in `ldd /usr/sbin/ip | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/ip | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/route for i in `ldd /usr/sbin/route | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/route | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/ifconfig for i in `ldd /usr/sbin/ifconfig | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/ifconfig | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot \cp /usr/bin/curl /data/chroot/bin ldd /usr/bin/curl for i in `ldd /usr/bin/curl | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/bin/curl | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done \cp -ap /etc/pki/ /data/chroot/etc/

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cd /data/chroot/bin   \cp /usr/bin/ls . chroot=/data/chroot ldd /usr/bin/ls for i in `ldd /usr/bin/ls | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/bin/ls | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done \cp /usr/sbin/ping . \cp /usr/sbin/arp /data/chroot/bin/ \cp /usr/sbin/ip /data/chroot/bin/ \cp /usr/bin/netstat /data/chroot/bin/ \cp /usr/sbin/route /data/chroot/bin/ \cp /usr/sbin/ifconfig /data/chroot/bin/ \cp /usr/bin/echo /data/chroot/bin/ ldd /usr/sbin/ping for i in `ldd /usr/sbin/ping | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/ping | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/arp for i in `ldd /usr/sbin/arp | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/arp | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/bin/netstat for i in `ldd /usr/bin/netstat | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/bin/netstat | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/ip for i in `ldd /usr/sbin/ip | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/ip | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/route for i in `ldd /usr/sbin/route | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/route | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot ldd /usr/sbin/ifconfig for i in `ldd /usr/sbin/ifconfig | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/sbin/ifconfig | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done chroot=/data/chroot \cp /usr/bin/curl /data/chroot/bin ldd /usr/bin/curl for i in `ldd /usr/bin/curl | awk '{print $3}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done for i in `ldd /usr/bin/curl | awk '{print $1}'| grep '^/lib'`;do \cp -v $i $chroot/lib64/;done \cp -ap  /etc/pki/ /data/chroot/etc/

SourceByrd's Weblog-https://note.t4x.org/environment/linux-env-chroot/