SquashFS只读文件系统

1. 简介

Squashfs（.sfs）是一套供Linux核心使用的GPL开源只读压缩文件系统。Squashfs能够为文件系统内的文件、inode及目录结构进行压缩，并支持最大1024千字节的块大小，以提供更大的压缩比。

Squashfs的设计是专门为一般的只读文件系统的使用而设计，它可应用于数据备份，或是系统资源紧张的电脑上使用。最初版本的Squashfs采用 gzip 的数据压缩。版本 2.6.34 之后的Linux内核增加了对 LZMA[1] 和 LZO [2]压缩算法的支持，版本 2.6.38 的内核增加了对LZMA2的支持，该算法同时也是xz使用的压缩算法。[3]

Linux 3.19及更新的内核中，Squashfs增加了LZ4压缩支持。[4]

Linux 4.14及更新的内核中，Squashfs增加了Zstandard压缩支持。[5]

版本 2.6.35 之后的内核包含的Squashfs增加了扩展文件属性支持。[6]

2. 用途

Squashfs常被用于各Linux发行版的LiveCD中，也用于OpenWrt 和DD-WRT 的路由器固件。Chromecast也是该文件系统的用户。在LiveCD中，Squashfs通常与UnionFS，OverlayFS和aufs等联合挂载文件系统结合使用，以便在LiveCD系统中提供可读写支持。Appimage项目也使用Squashfs作为镜像。

需要用到的工具有 squashfs-tools
这个工具包含 2 个工具打包用的 mksquashfs 和解包用的 unsquashfs

重写解包过程

2.1. 解包 filesystem.squashfs

 mkdir extract_squashfs  
 sudo unsquashfs -d extract_squashfs /home/ivo/filesystem.squashfs

添加驱动，举例使用chroot，添加东西要在chroot里面比较合适

test@ivoserver:~$ sudo chroot ./extract_squashfs/ /bin/bash
root@ivoserver:/# ls
bin  etc   initrd.img  lib32  media  opt   root  sbin  sys       tmp  var
dev  home  lib         lib64  mnt    proc  run   srv   tftpboot  usr  vmlinuz
root@ivoserver:/# ls
bin         lib32  root                                                              tftpboot
dev         lib64  run                                                               tmp
etc         media  sbin                                                              usr
home        mnt    SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz  var
initrd.img  opt    srv                                                               vmlinuz
lib         proc   sys
root@ivoserver:/# mkdir 7532
root@ivoserver:/# cd 7532/
root@ivoserver:/7532# mv ../SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz .
root@ivoserver:/7532# ls
SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz
root@ivoserver:/7532# tar xf SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz
root@ivoserver:/7532# ls
SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz  SUSI5.0.23840
root@ivoserver:/7532# cd S
SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz
SUSI5.0.23840/
root@ivoserver:/7532# cd SUSI5.0.23840/
root@ivoserver:/7532/SUSI5.0.23840# ls
Driver  license.rtf  README  Susi4Demo  SusiAiDemo  SUSIDeviceDEMO  SUSIIoTDEMO
root@ivoserver:/7532/SUSI5.0.23840# cd Driver/
root@ivoserver:/7532/SUSI5.0.23840/Driver# ls
AI                libjansson.a          libSUSI-3.02.so.1.0.8  libSUSIDevice.so
ini               libjansson.so         libSUSI-4.00.so        libSUSIDevice.so.1.0.0
install.sh        libjansson.so.4       libSUSI-4.00.so.1      libSusiIoT.so
libEApi.so        libjansson.so.4.11.0  libSUSI-4.00.so.1.0.0  libSusiIoT.so.1.0.0
libEApi.so.1      libSUSI-3.02.so       libSUSIAI.so           modules
libEApi.so.1.0.0  libSUSI-3.02.so.1     libSUSIAI.so.1.0.0
root@ivoserver:/7532/SUSI5.0.23840/Driver# chmod +x install.sh
root@ivoserver:/7532/SUSI5.0.23840/Driver# ./install.sh
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Running in chroot, ignoring command 'is-active'
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
*****************************************************************
*                SOFTWARE SUSI LICENSE AGREEMENT                *
* Please carefully read the terms and conditions in license.rtf.*
* Do you agree with above patent declaration?                   *
*****************************************************************
  [Y] Yes, I agree.  [N] No, I don't agree.
y
Install SUSI AI service.
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to allocate pty: No such device
Install SUSI library.
        libjansson.so.4 (libc6,x86-64) => /lib/x86_64-linux-gnu/libjansson.so.4
        libjansson.so.4 (libc6,x86-64) => /lib/libjansson.so.4
        libjansson.so (libc6,x86-64) => /lib/libjansson.so
        libSusiIoT.so (libc6,x86-64) => /lib/libSusiIoT.so
        libSUSIDevice.so.1 (libc6,x86-64) => /lib/libSUSIDevice.so.1
        libSUSIDevice.so (libc6,x86-64) => /lib/libSUSIDevice.so
        libSUSIAI.so.1 (libc6,x86-64) => /lib/libSUSIAI.so.1
        libSUSIAI.so (libc6,x86-64) => /lib/libSUSIAI.so
        libSUSI-4.00.so.1 (libc6,x86-64) => /lib/libSUSI-4.00.so.1
        libSUSI-4.00.so (libc6,x86-64) => /lib/libSUSI-4.00.so
        libSUSI-3.02.so.1 (libc6,x86-64) => /lib/libSUSI-3.02.so.1
        libSUSI-3.02.so (libc6,x86-64) => /lib/libSUSI-3.02.so
        libEApi.so.1 (libc6,x86-64) => /lib/libEApi.so.1
        libEApi.so (libc6,x86-64) => /lib/libEApi.so
root@ivoserver:/7532/SUSI5.0.23840/Driver# cd /lib
root@ivoserver:/lib# ls
7zip           kernel                                libSusiIoT.so.1.0.0  rsyslog
Advantech      klibc                                 lighttpd             ruby
apt            klibc-D67x9cQZJoe6j863VWhTpYmFGDU.so  linux-boot-probes    runit-helper
bicon          ld-linux.so.2                         live                 sasl2
binfmt.d       libcpufreq.so.0                       locale               scsi
brltty         libcpufreq.so.0.0.0                   lsb                  scsitools
casync         libdislocker.so                       mc                   sftp-server
cgi-bin        libdislocker.so.0.7                   mime                 shim
compat-ld      libdislocker.so.0.7.2                 modprobe.d           ssl
console-setup  libEApi.so                            modules              sysctl.d
cryptsetup     libEApi.so.1                          modules-load.d       syslinux
dbus-1.0       libEApi.so.1.0.0                      mutt                 SYSLINUX
dpkg           libedac.so.1                          nagios               SYSLINUX.EFI
dracut         libedac.so.1.1.1                      NetworkManager       sysstat
dvtm           libjansson.a                          open-iscsi           systemd
encfs          libjansson.so                         openssh              sysusers.d
environment.d  libjansson.so.4                       os-prober            tcltk
EXTLINUX       libjansson.so.4.11.0                  os-probes            tmpfiles.d
file           libowfat.so.0                         os-release           udev
firewalld      libsupp.a                             pam.d                udisks2
firmware       libSUSI-3.02.so                       pcmciautils          ufw
gnupg          libSUSI-3.02.so.1                     pcrlock.d            uml
gnupg2         libSUSI-3.02.so.1.0.8                 pcsc                 user-setup
gold-ld        libSUSI-4.00.so                       pkgconfig            valgrind
gpm            libSUSI-4.00.so.1                     pm-utils             w3m
groff          libSUSI-4.00.so.1.0.0                 policykit-1          X11
grub           libSUSIAI.so                          polkit-1             x86_64-linux-gnu
grub-legacy    libSUSIAI.so.1                        pppd                 xen-4.17
hdparm         libSUSIAI.so.1.0.0                    PXELINUX             xfsprogs
ifupdown       libSUSIDevice.so                      python3              zfs-linux
init           libSUSIDevice.so.1                    python3.11
initcpio       libSUSIDevice.so.1.0.0                resolvconf
ISOLINUX       libSusiIoT.so                         rpm
root@ivoserver:/lib#
exit

2.1.1. 打包filesystem.squashfs

# 查看压缩信息
root@ivoserver:/home/test/test# unsquashfs -s filesystem.squashfs
Found a valid SQUASHFS 4:0 superblock on filesystem.squashfs.
Creation or last append time Tue Jan 16 00:14:38 2024
Filesystem size 368334194 bytes (359701.36 Kbytes / 351.27 Mbytes)
Compression xz
        Dictionary size 1048576
        Filters selected: x86
Block size 1048576
Filesystem is exportable via NFS
Inodes are compressed
Data is compressed
Uids/Gids (Id table) are compressed
Fragments are compressed
Always-use-fragments option is not specified
Xattrs are compressed
Duplicates are removed
Number of fragments 656
Number of inodes 41575
Number of ids 26
Number of xattr ids 2

# 压缩方式 xz
# 按 xz 压缩

root@ivoserver:/home/test# mksquashfs  /tmp/squashfs-root/ filesystem.squashfs -comp xz
Parallel mksquashfs: Using 2 processors
Creating 4.0 filesystem on filesystem.squashfs, block size 131072.
[==========================================================/] 38584/38584 100%

Exportable Squashfs 4.0 filesystem, xz compressed, data block size 131072
        compressed data, compressed metadata, compressed fragments,
        compressed xattrs, compressed ids
        duplicates are removed
Filesystem size 395012.22 Kbytes (385.75 Mbytes)
        34.64% of uncompressed filesystem size (1140363.08 Kbytes)
Inode table size 335140 bytes (327.29 Kbytes)
        23.52% of uncompressed inode table size (1424714 bytes)
Directory table size 370108 bytes (361.43 Kbytes)
        40.34% of uncompressed directory table size (917380 bytes)
Xattr table size 78 bytes (0.08 Kbytes)
        97.50% of uncompressed xattr table size (80 bytes)
Number of duplicate files found 2263
Number of inodes 42224
Number of files 32804
Number of fragments 2784
Number of symbolic links 4167
Number of device nodes 8
Number of fifo nodes 0
Number of socket nodes 0
Number of directories 5245
Number of ids (unique uids + gids) 27
Number of uids 12
        root (0)
        systemd-timesync (104)
        systemd-resolve (102)
        syslog (107)
        www-data (33)
        tss (110)
        vboxadd (998)
        test (1000)
        messagebus (103)
        _apt (100)
        landscape (111)
        unknown (997)
Number of gids 23
        root (0)
        dip (30)
        adm (4)
        shadow (42)
        unknown (992)
        messagebus (104)
        systemd-network (102)
        nogroup (65534)
        www-data (33)
        utmp (43)
        vboxdrmipc (998)
        mail (8)
        input (106)
        render (109)
        tty (5)
        ivo (1000)
        systemd-resolve (103)
        crontab (112)
        systemd-journal (101)
        unknown (997)
        systemd-timesync (105)
        staff (50)
        vboxsf (999)

以下是 mksquashfs /tmp/squashfs-root/ filesystem.squashfs -comp xz 命令的参数解释：

mksquashfs：命令名称，用于创建 squashfs 文件系统。
/tmp/squashfs-root/：指定要包含在 squashfs 文件系统中的根目录。在本例中，根目录是 /tmp/squashfs-root/。
filesystem.squashfs：指定要创建的 squashfs 文件的名称。在本例中，squashfs 文件名为 filesystem.squashfs。
-comp xz：指定压缩算法。在本例中，使用 xz 压缩算法。

该命令的执行结果是：

将创建一个名为 filesystem.squashfs 的 squashfs 文件。
该文件将包含 /tmp/squashfs-root/ 目录中的所有文件和目录。
使用 xz 算法压缩 squashfs 文件。

2.1.2. squashfs工具参数

命令 sudo unsquashfs -d extract_squashfs mnt_iso/path/to/filesystem.squashfs 用于从一个squashfs格式的压缩文件中提取内容，并将其解压到指定的目录中。这个命令通常用于处理Linux Live CD、Linux根文件系统镜像或其他以squashfs格式存储的文件系统镜像。下面是命令各部分的详细解释：

sudo：这是一个命令行程序，允许授权的用户以另一个用户（通常是超级用户或root）的安全权限来运行程序。在这个上下文中，它用于获取解压squashfs文件所需的必要权限。
unsquashfs：这是一个用于解压squashfs格式文件的命令行工具。squashfs是一种高度压缩的只读文件系统，常用于Linux Live CDs和其他类型的系统镜像中，以减少存储需求。
-d extract_squashfs：这是unsquashfs命令的一个选项，指定了解压后文件的存放目录。在这个例子中，解压后的内容将被放置在名为extract_squashfs的目录中。如果该目录不存在，unsquashfs将会尝试创建它。
mnt_iso/path/to/filesystem.squashfs：这是你想要解压的squashfs文件的路径。在这个例子中，假设你已经将Live CD的ISO文件挂载到了mnt_iso目录，并且filesystem.squashfs文件位于该ISO文件的某个子目录下。你需要将path/to/替换为实际的文件路径。

总结来说，这个命令的作用是：以超级用户权限运行unsquashfs工具，将位于mnt_iso/path/to/filesystem.squashfs的squashfs文件解压到当前用户主目录下的extract_squashfs目录中。这样，你就可以访问和修改squashfs文件系统中的文件和目录了。

请注意，由于squashfs是只读文件系统，因此你不能直接修改squashfs文件本身。相反，你需要修改解压后的内容，然后使用这些修改过的内容来创建一个新的squashfs文件或ISO镜像。

命令 sudo mksquashfs extract_squashfs new_filesystem.squashfs -comp xz 用于创建一个新的squashfs文件系统映像，这个命令使用了几个关键的选项来指定压缩方法和其他参数。下面是对这个命令各部分的详细解释：

sudo：这是一个命令行程序，用于以超级用户（通常是root）的权限执行命令。在这个上下文中，sudo 是必需的，因为创建squashfs映像可能需要访问或修改系统级别的文件或资源。
mksquashfs：这是创建squashfs文件系统映像的命令行工具。squashfs是一种高度压缩的只读文件系统，常用于Linux Live CDs和其他类型的系统镜像中。
extract_squashfs：这是mksquashfs命令的第一个参数，指定了要包含在新squashfs映像中的源目录。在这个例子中，extract_squashfs 应该是一个已经存在的目录，包含了所有你想要包含在squashfs映像中的文件和目录。
new_filesystem.squashfs：这是mksquashfs命令的第二个参数，指定了新创建的squashfs映像文件的名称和路径。在这个例子中，新创建的squashfs映像将被保存在当前目录下，并命名为new_filesystem.squashfs。
-comp xz：这是一个选项，用于指定squashfs映像的压缩算法。在这个例子中，xz 是一个流行的压缩算法，以其高压缩比而闻名。使用-comp xz选项可以确保squashfs映像使用xz算法进行压缩。

2.1.2.1. 各种选项的对比

时间	命令	大小
1m18.863s	time sudo mksquashfs /home/test/newsquashfs/ lz4xhcnew7532filesystem.squashfs -comp lz4 -Xhc	522M
0m2.877s	time sudo mksquashfs /home/test/newsquashfs/ lz4new7532filesystem.squashfs -comp lz4	608M
1m29.272s	time sudo mksquashfs /home/test/newsquashfs/ lzonew7532filesystem.squashfs -comp lzo	488M
1m7.842s	time sudo mksquashfs /home/test/newsquashfs/ gzipnew7532filesystem.squashfs -comp gzip	448M
2m17.279s	time sudo mksquashfs /home/test/newsquashfs/ xznew7532filesystem.squashfs -comp xz	386M
1m7.719s	time sudo mksquashfs /home/test/newsquashfs/ zstdnew7532filesystem.squashfs -comp zstd	422M
0m22.334s	time sudo mksquashfs /home/test/newsquashfs/ lzocom5new7532filesystem.squashfs -comp lzo -Xcompression-level 5	497M
0m27.315s	time sudo mksquashfs /home/test/newsquashfs/ lzocom6new7532filesystem.squashfs -comp lzo -Xcompression-level 6	494M

3. 官方clonezilla修改样例

How can I add a program in the main file system of Clonezilla live, i.e. in the file "filesystem.squashfs"?
The follow describes how to add a program "ms-sys" in Cloinezilla live.
Follow http://ms-sys.sourceforge.net/, you can compile ms-sys binary code for lenny ("make", "gcc", and "gettext" packages are required to compile ms-sys), say "~/ms-sys-2.3.0" is its source path.
You need a GNU/Linux system as a working environment to do this. Here we use Debian Jessie as the working environment. First we need to install squashfs-tools:
$ sudo apt-get update; sudo apt-get install squashfs-tools
Download Clonezilla live 2.5.0-25 zip file, then uncompress clonezilla-live-2.5.0-25-i686-pae.zip and extract the original filesystem.squashfs (Here 2.5.0-25 is an example, you can do it for different version of Clonezilla live)
$ mkdir ~/zip-tmp ~/squashfs-tmp
$ unzip clonezilla-live-2.5.0-25-i686-pae.zip -d ~/zip-tmp
$ cp ~/zip-tmp/live/filesystem.squashfs ~/squashfs-tmp
$ cd ~/squashfs-tmp; sudo unsquashfs filesystem.squashfs
(it will extract filesystem.squashfs to directory "squashfs-root" )
Copy ms-sys binary files into relative path of squashfs-root:
$ sudo cp ~/ms-sys-2.3.0/bin/ms-sys squashfs-root/usr/local/bin
Rebuild the new filesystem.squashfs and replace the original one ,then rebuild clonezilla-live zip file with a XZ-compressed filesystem.squashfs:
$ sudo mksquashfs squashfs-root filesystem.squashfs.new -b 1024k -comp xz -Xbcj x86 -e boot
$ sudo cp filesystem.squashfs.new ~/zip-tmp/live/filesystem.squashfs
$ cd ~/zip-tmp ; sudo zip -r ../clonezilla-live.new.zip ./*
Now you have clonezilla-live.new.zip with ms-sys included.

4. 7532 添加 clonezilla susi 操作过程

test@ivoserver:~/ubuntusq/test$ sudo unsquashfs filesystem.squashfs
Parallel unsquashfs: Using 2 processors
39369 inodes (35223 blocks) to write

[=============================================================================/] 74592/74592 100%

created 34967 files
created 5655 directories
created 4368 symlinks
created 8 devices
created 0 fifos
created 0 sockets
created 26 hardlinks
test@ivoserver:~/ubuntusq/test$ cp ~/check ~/7532
test@ivoserver:~/ubuntusq/test$ sudo cp ~/7532 squashfs-root/ -rf
test@ivoserver:~/ubuntusq/test$ sudo chroot ./squashfs-root/ /bin/bash
root@ivoserver:/# cd 7532/
root@ivoserver:/7532# tar xf
check
SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz
root@ivoserver:/7532# tar xf SOM-7532_SUSI5.0.23840_Release_2023_12_22_ubuntu22.04_x64.tar.gz
root@ivoserver:/7532# cp check /usr/bin/autoclone
root@ivoserver:/7532# chmod +x /usr/bin/auto
autoclone   autoexpect  autopasswd
root@ivoserver:/7532# chmod +x /usr/bin/autoclone
root@ivoserver:/7532# cd SUSI5.0.23840/
root@ivoserver:/7532/SUSI5.0.23840# cd
Driver/         README          SusiAiDemo/     SUSIIoTDEMO/
license.rtf     Susi4Demo/      SUSIDeviceDEMO/
root@ivoserver:/7532/SUSI5.0.23840# cd Driver/
root@ivoserver:/7532/SUSI5.0.23840/Driver# ls
AI                libjansson.a          libSUSI-3.02.so.1.0.8  libSUSIDevice.so
ini               libjansson.so         libSUSI-4.00.so        libSUSIDevice.so.1.0.0
install.sh        libjansson.so.4       libSUSI-4.00.so.1      libSusiIoT.so
libEApi.so        libjansson.so.4.11.0  libSUSI-4.00.so.1.0.0  libSusiIoT.so.1.0.0
libEApi.so.1      libSUSI-3.02.so       libSUSIAI.so           modules
libEApi.so.1.0.0  libSUSI-3.02.so.1     libSUSIAI.so.1.0.0
root@ivoserver:/7532/SUSI5.0.23840/Driver# ./install.sh
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Running in chroot, ignoring command 'is-active'
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
*****************************************************************
*                SOFTWARE SUSI LICENSE AGREEMENT                *
* Please carefully read the terms and conditions in license.rtf.*
* Do you agree with above patent declaration?                   *
*****************************************************************
  [Y] Yes, I agree.  [N] No, I don't agree.
y
Install SUSI AI service.
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Running in chroot, ignoring command 'daemon-reload'
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Configuration file /etc/systemd/system/susi_api_server.service is marked executable. Please remove executable permission bits. Proceeding anyway.
Created symlink /etc/systemd/system/multi-user.target.wants/susi_api_server.service → /etc/systemd/system/susi_api_server.service.
sudo: unable to resolve host ivoserver: Temporary failure in name resolution
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Running in chroot, ignoring command 'start'
Install SUSI library.
        libjansson.so.4 (libc6,x86-64) => /lib/x86_64-linux-gnu/libjansson.so.4
        libjansson.so.4 (libc6,x86-64) => /lib/libjansson.so.4
        libjansson.so (libc6,x86-64) => /lib/libjansson.so
        libSusiIoT.so (libc6,x86-64) => /lib/libSusiIoT.so
        libSUSIDevice.so.1 (libc6,x86-64) => /lib/libSUSIDevice.so.1
        libSUSIDevice.so (libc6,x86-64) => /lib/libSUSIDevice.so
        libSUSIAI.so.1 (libc6,x86-64) => /lib/libSUSIAI.so.1
        libSUSIAI.so (libc6,x86-64) => /lib/libSUSIAI.so
        libSUSI-4.00.so.1 (libc6,x86-64) => /lib/libSUSI-4.00.so.1
        libSUSI-4.00.so (libc6,x86-64) => /lib/libSUSI-4.00.so
        libSUSI-3.02.so.1 (libc6,x86-64) => /lib/libSUSI-3.02.so.1
        libSUSI-3.02.so (libc6,x86-64) => /lib/libSUSI-3.02.so
        libEApi.so.1 (libc6,x86-64) => /lib/libEApi.so.1
        libEApi.so (libc6,x86-64) => /lib/libEApi.so
root@ivoserver:/7532/SUSI5.0.23840/Driver# cd
root@ivoserver:~# rm -rf /7532/
root@ivoserver:~# exit
exit
test@ivoserver:~/ubuntusq/test$ sudo mksquashfs squashfs-root filesystem.squashfs.new819 -b 1024k -comp xz -Xbcj x86 -e boot
Parallel mksquashfs: Using 2 processors
Creating 4.0 filesystem on filesystem.squashfs.new819, block size 1048576.
[=============================================================================-] 35950/35950 100%

Exportable Squashfs 4.0 filesystem, xz compressed, data block size 1048576
        compressed data, compressed metadata, compressed fragments,
        compressed xattrs, compressed ids
        duplicates are removed
Filesystem size 424690.35 Kbytes (414.74 Mbytes)
        36.66% of uncompressed filesystem size (1158524.61 Kbytes)
Inode table size 343568 bytes (335.52 Kbytes)
        22.62% of uncompressed inode table size (1519008 bytes)
Directory table size 405194 bytes (395.70 Kbytes)
        39.66% of uncompressed directory table size (1021765 bytes)
Xattr table size 78 bytes (0.08 Kbytes)
        97.50% of uncompressed xattr table size (80 bytes)
Number of duplicate files found 2540
Number of inodes 45750
Number of files 35694
Number of fragments 670
Number of symbolic links 4382
Number of device nodes 8
Number of fifo nodes 0
Number of socket nodes 0
Number of directories 5666
Number of hard-links 26
Number of ids (unique uids + gids) 26
Number of uids 12
        root (0)
        systemd-timesync (104)
        messagebus (103)
        n2n (997)
        www-data (33)
        uuidd (108)
        vboxadd (998)
        systemd-resolve (102)
        tcpdump (109)
        lxd (999)
        systemd-network (101)
        pollinate (105)
Number of gids 23
        root (0)
        dip (30)
        adm (4)
        shadow (42)
        unknown (992)
        messagebus (104)
        systemd-resolve (103)
        nogroup (65534)
        www-data (33)
        utmp (43)
        vboxdrmipc (998)
        mail (8)
        input (106)
        lxd (110)
        sgx (107)
        tty (5)
        syslog (113)
        systemd-network (102)
        vboxsf (999)
        unknown (993)
        systemd-journal (101)
        staff (50)
        systemd-timesync (105)