I use debootstrap create base system rootfs, I get error that libcrypt.so.1 has existed.
I run command:
debootstrap --arch arm64 --foreign focal focal/build/rootfs http://ports.ubuntu.com/
log:
root@ubuntu:~/ukarmimg/raspi4# tail focal/build/rootfs/debootstrap/debootstrap.log
2020-03-08 01:51:06 URL:http://ports.ubuntu.com/pool/main/v/vim/vim-common_8.1.2269-1ubuntu4_all.deb [85040/85040] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/vim-common_2%3a8.1.2269-1ubuntu4_all.deb" [1]
2020-03-08 01:51:08 URL:http://ports.ubuntu.com/pool/main/v/vim/vim-tiny_8.1.2269-1ubuntu4_arm64.deb [530576/530576] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/vim-tiny_2%3a8.1.2269-1ubuntu4_arm64.deb" [1]
2020-03-08 01:51:09 URL:http://ports.ubuntu.com/pool/main/n/newt/whiptail_0.52.21-4ubuntu2_arm64.deb [16388/16388] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/whiptail_0.52.21-4ubuntu2_arm64.deb" [1]
2020-03-08 01:51:10 URL:http://ports.ubuntu.com/pool/main/x/xdg-user-dirs/xdg-user-dirs_0.17-2ubuntu1_arm64.deb [47640/47640] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/xdg-user-dirs_0.17-2ubuntu1_arm64.deb" [1]
2020-03-08 01:51:11 URL:http://ports.ubuntu.com/pool/main/x/xkeyboard-config/xkb-data_2.29-2_all.deb [348648/348648] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/xkb-data_2.29-2_all.deb" [1]
2020-03-08 01:51:12 URL:http://ports.ubuntu.com/pool/main/v/vim/xxd_8.1.2269-1ubuntu4_arm64.deb [49508/49508] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/xxd_2%3a8.1.2269-1ubuntu4_arm64.deb" [1]
2020-03-08 01:51:13 URL:http://ports.ubuntu.com/pool/main/x/xz-utils/xz-utils_5.2.4-1_arm64.deb [81520/81520] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/xz-utils_5.2.4-1_arm64.deb" [1]
2020-03-08 01:51:13 URL:http://ports.ubuntu.com/pool/main/z/zlib/zlib1g_1.2.11.dfsg-1ubuntu3_arm64.deb [51124/51124] -> "/root/ukarmimg/raspi4/focal/build/rootfs//var/cache/apt/archives/partial/zlib1g_1%3a1.2.11.dfsg-1ubuntu3_arm64.deb" [1]
tar: ./usr/lib/aarch64-linux-gnu/libcrypt.so.1: Cannot create symlink to 'libcrypt.so.1.1.0': File exists
tar: Exiting with failure status due to previous errors
root@ubuntu:~/ukarmimg/raspi4# ls -l focal/build/rootfs/usr/lib/aarch64-linux-gnu/ | grep libcrypt
-rw-r--r-- 1 root root 35136 Nov 29 14:19 libcrypt-2.30.so
lrwxrwxrwx 1 root root 16 Nov 29 14:19 libcrypt.so.1 -> libcrypt-2.30.so
-rw-r--r-- 1 root root 198584 Mar 6 08:55 libcrypt.so.1.1.0
It seems that libc6 has linked it, so libcrypt1 can not do link.