当我mount --bind一个目录，chroot 到包含它的目录，然后卸载它时，我无法删除该目录。
sudo mount --bind /usr/ /home/ubuntu/Code/conversations/jail/usr
sudo chroot /home/ubuntu/Code/conversations
exit
sudo umount /home/ubuntu/Code/conversations/jail/usr
sudo rmdir /home/ubuntu/Code/conversations/jail/usr
rmdir: failed to remove '/home/ubuntu/Code/conversations/jail/usr': Device or resource busy
我需要使用一些魔法umount或mount命令来避免这个问题吗？
请注意，卸载后该目录是空的，但似乎有很多进程附加到其中，其中一些进程我不喜欢直接杀死。理想情况下，我希望安装方式不会导致它们像这样卡住。
lsof /home/ubuntu/Code/conversations/jail/usr
lsof: WARNING: can't stat() ext4 file system /home/ubuntu/Code/conversations/jail/home/ubuntu/Code/conversations/jail/opt/pynlp
Output information may be incomplete.
lsof: WARNING: can't stat() ext4 file system /home/ubuntu/Code/conversations/jail/home/ubuntu/Code/conversations/jail/opt/pynlp
Output information may be incomplete.
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
systemd 26578 ubuntu cwd DIR 259,1 4096 2 /
systemd 26578 ubuntu rtd DIR 259,1 4096 2 /
systemd 26578 ubuntu txt REG 259,1 1595792 27443 /lib/systemd/systemd
systemd 26578 ubuntu mem REG 259,1 1700792 2087 /lib/x86_64-linux-gnu/libm-2.27.so
systemd 26578 ubuntu mem REG 259,1 121016 1764 /lib/x86_64-linux-gnu/libudev.so.1.6.9
systemd 26578 ubuntu mem REG 259,1 84032 2072 /lib/x86_64-linux-gnu/libgpg-error.so.0.22.0
systemd 26578 ubuntu mem REG 259,1 43304 2208 /lib/x86_64-linux-gnu/libjson-c.so.3.0.1
systemd 26578 ubuntu mem REG 259,1 34872 6176 /usr/lib/x86_64-linux-gnu/libargon2.so.0
systemd 26578 ubuntu mem REG 259,1 432640 2207 /lib/x86_64-linux-gnu/libdevmapper.so.1.02.1
systemd 26578 ubuntu mem REG 259,1 18680 2076 /lib/x86_64-linux-gnu/libattr.so.1.1.0
systemd 26578 ubuntu mem REG 259,1 18712 2057 /lib/x86_64-linux-gnu/libcap-ng.so.0.0.0
systemd 26578 ubuntu mem REG 259,1 27112 2165 /lib/x86_64-linux-gnu/libuuid.so.1.3.0
systemd 26578 ubuntu mem REG 259,1 14560 2086 /lib/x86_64-linux-gnu/libdl-2.27.so
systemd 26578 ubuntu mem REG 259,1 464824 2158 /lib/x86_64-linux-gnu/libpcre.so.3.13.3
systemd 26578 ubuntu mem REG 259,1 144976 2178 /lib/x86_64-linux-gnu/libpthread-2.27.so
systemd 26578 ubuntu mem REG 259,1 112672 4764 /usr/lib/x86_64-linux-gnu/liblz4.so.1.7.1
systemd 26578 ubuntu mem REG 259,1 153984 2103 /lib/x86_64-linux-gnu/liblzma.so.5.2.2
systemd 26578 ubuntu mem REG 259,1 206872 2221 /lib/x86_64-linux-gnu/libidn.so.11.6.16
systemd 26578 ubuntu mem REG 259,1 27088 6177 /usr/lib/x86_64-linux-gnu/libip4tc.so.0.1.0
systemd 26578 ubuntu mem REG 259,1 1155768 2164 /lib/x86_64-linux-gnu/libgcrypt.so.20.2.1
systemd 26578 ubuntu mem REG 259,1 22768 2205 /lib/x86_64-linux-gnu/libcap.so.2.25
systemd 26578 ubuntu mem REG 259,1 310040 2070 /lib/x86_64-linux-gnu/libcryptsetup.so.12.2.0
systemd 26578 ubuntu mem REG 259,1 31232 2074 /lib/x86_64-linux-gnu/libacl.so.1.1.0
systemd 26578 ubuntu mem REG 259,1 64144 2199 /lib/x86_64-linux-gnu/libapparmor.so.1.4.2
systemd 26578 ubuntu mem REG 259,1 92208 2225 /lib/x86_64-linux-gnu/libkmod.so.2.3.2
systemd 26578 ubuntu mem REG 259,1 124848 2174 /lib/x86_64-linux-gnu/libaudit.so.1.0.0
systemd 26578 ubuntu mem REG 259,1 55848 2058 /lib/x86_64-linux-gnu/libpam.so.0.83.1
systemd 26578 ubuntu mem REG 259,1 311720 2168 /lib/x86_64-linux-gnu/libblkid.so.1.1.0
systemd 26578 ubuntu mem REG 259,1 340232 2078 /lib/x86_64-linux-gnu/libmount.so.1.1.0
systemd 26578 ubuntu mem REG 259,1 154832 2161 /lib/x86_64-linux-gnu/libselinux.so.1
systemd 26578 ubuntu mem REG 259,1 288976 2229 /lib/x86_64-linux-gnu/libseccomp.so.2.4.1
systemd 26578 ubuntu mem REG 259,1 31680 2180 /lib/x86_64-linux-gnu/librt-2.27.so
systemd 26578 ubuntu mem REG 259,1 2363632 2434 /lib/systemd/libsystemd-shared-237.so
systemd 26578 ubuntu mem REG 259,1 2030544 2083 /lib/x86_64-linux-gnu/libc-2.27.so
systemd 26578 ubuntu mem REG 259,1 170960 2079 /lib/x86_64-linux-gnu/ld-2.27.so
bash 27117 ubuntu cwd DIR 259,1 4096 1287299 /home/ubuntu/Code/conversations/jail
bash 27117 ubuntu rtd DIR 259,1 4096 2 /
bash 27117 ubuntu txt REG 259,1 1113504 32 /bin/bash
bash 27117 ubuntu mem REG 259,1 47568 2093 /lib/x86_64-linux-gnu/libnss_files-2.27.so
bash 27117 ubuntu mem REG 259,1 97176 2090 /lib/x86_64-linux-gnu/libnsl-2.27.so
bash 27117 ubuntu mem REG 259,1 47576 2095 /lib/x86_64-linux-gnu/libnss_nis-2.27.so
bash 27117 ubuntu mem REG 259,1 39744 2091 /lib/x86_64-linux-gnu/libnss_compat-2.27.so
bash 27117 ubuntu mem REG 259,1 1516558 7807 /usr/lib/locale/C.UTF-8/LC_COLLATE
bash 27117 ubuntu mem REG 259,1 2030544 2083 /lib/x86_64-linux-gnu/libc-2.27.so
bash 27117 ubuntu mem REG 259,1 14560 2086 /lib/x86_64-linux-gnu/libdl-2.27.so
bash 27117 ubuntu mem REG 259,1 170784 2107 /lib/x86_64-linux-gnu/libtinfo.so.5.9
bash 27117 ubuntu mem REG 259,1 170960 2079 /lib/x86_64-linux-gnu/ld-2.27.so
bash 27117 ubuntu mem REG 259,1 199772 7808 /usr/lib/locale/C.UTF-8/LC_CTYPE
bash 27117 ubuntu mem REG 259,1 50 7813 /usr/lib/locale/C.UTF-8/LC_NUMERIC
bash 27117 ubuntu mem REG 259,1 3360 7816 /usr/lib/locale/C.UTF-8/LC_TIME
bash 27117 ubuntu mem REG 259,1 270 7811 /usr/lib/locale/C.UTF-8/LC_MONETARY
bash 27117 ubuntu mem REG 259,1 48 7805 /usr/lib/locale/C.UTF-8/LC_MESSAGES/SYS_LC_MESSAGES
bash 27117 ubuntu mem REG 259,1 34 7814 /usr/lib/locale/C.UTF-8/LC_PAPER
bash 27117 ubuntu mem REG 259,1 62 7812 /usr/lib/locale/C.UTF-8/LC_NAME
bash 27117 ubuntu mem REG 259,1 131 7806 /usr/lib/locale/C.UTF-8/LC_ADDRESS
bash 27117 ubuntu mem REG 259,1 47 7815 /usr/lib/locale/C.UTF-8/LC_TELEPHONE
bash 27117 ubuntu mem REG 259,1 23 7810 /usr/lib/locale/C.UTF-8/LC_MEASUREMENT
bash 27117 ubuntu mem REG 259,1 1683056 7802 /usr/lib/locale/locale-archive
bash 27117 ubuntu mem REG 259,1 26376 5016 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache
bash 27117 ubuntu mem REG 259,1 252 7809 /usr/lib/locale/C.UTF-8/LC_IDENTIFICATION
lsof 27234 ubuntu cwd DIR 259,1 4096 1287299 /home/ubuntu/Code/conversations/jail
lsof 27234 ubuntu rtd DIR 259,1 4096 2 /
lsof 27234 ubuntu txt REG 259,1 163224 4561 /usr/bin/lsof
lsof 27234 ubuntu mem REG 259,1 144976 2178 /lib/x86_64-linux-gnu/libpthread-2.27.so
lsof 27234 ubuntu mem REG 259,1 14560 2086 /lib/x86_64-linux-gnu/libdl-2.27.so
lsof 27234 ubuntu mem REG 259,1 464824 2158 /lib/x86_64-linux-gnu/libpcre.so.3.13.3
lsof 27234 ubuntu mem REG 259,1 2030544 2083 /lib/x86_64-linux-gnu/libc-2.27.so
lsof 27234 ubuntu mem REG 259,1 154832 2161 /lib/x86_64-linux-gnu/libselinux.so.1
lsof 27234 ubuntu mem REG 259,1 170960 2079 /lib/x86_64-linux-gnu/ld-2.27.so
lsof 27234 ubuntu mem REG 259,1 199772 7808 /usr/lib/locale/C.UTF-8/LC_CTYPE
lsof 27234 ubuntu mem REG 259,1 1683056 7802 /usr/lib/locale/locale-archive
lsof 27234 ubuntu mem REG 259,1 26376 5016 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache
lsof 27235 ubuntu cwd DIR 259,1 4096 1287299 /home/ubuntu/Code/conversations/jail
lsof 27235 ubuntu rtd DIR 259,1 4096 2 /
lsof 27235 ubuntu txt REG 259,1 163224 4561 /usr/bin/lsof
lsof 27235 ubuntu mem REG 259,1 144976 2178 /lib/x86_64-linux-gnu/libpthread-2.27.so
lsof 27235 ubuntu mem REG 259,1 14560 2086 /lib/x86_64-linux-gnu/libdl-2.27.so
lsof 27235 ubuntu mem REG 259,1 464824 2158 /lib/x86_64-linux-gnu/libpcre.so.3.13.3
lsof 27235 ubuntu mem REG 259,1 2030544 2083 /lib/x86_64-linux-gnu/libc-2.27.so
lsof 27235 ubuntu mem REG 259,1 154832 2161 /lib/x86_64-linux-gnu/libselinux.so.1
lsof 27235 ubuntu mem REG 259,1 170960 2079 /lib/x86_64-linux-gnu/ld-2.27.so
lsof 27235 ubuntu mem REG 259,1 199772 7808 /usr/lib/locale/C.UTF-8/LC_CTYPE
lsof 27235 ubuntu mem REG 259,1 1683056 7802 /usr/lib/locale/locale-archive
lsof 27235 ubuntu mem REG 259,1 26376 5016 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache