#!/bin/bash STR=`uname -a` SUB='Linux' if [[ "$STR" == *"$SUB"* ]]; then echo "It's there." fi但是在 busybox 的 shell 不支援，所以要用另一個語法：
#!/bin/bash
STR=`uname -a`
SUB='Linux'
case $STR in
*"$SUB"*)
echo "It's there."
;;
esac
mender-artifact write rootfs-image -f /mnt/root-part.ext4 \
-n artifact-name \
--software-version 1.0 \
-o snapshot-release.1.0.mender \
-t device-type
就可以轉成上傳道 mender.io server 的 release 檔 (snapshot-release.1.0.mender)USER="user" HOST="host-ip" mender snapshot dump --source /dev/mmcblk0p8 | ssh $USER@$HOST /bin/sh -c 'cat > $HOME/root-part.ext4`
mender -install /data/1234.mender一樣會更新到另一個 partition，然後呼叫 fw_setenv 來更新開機參數。
Plugin sudoers_policy /usr/lib/sudoers.so出現 Error:
sudo: error in /etc/sudo.conf, line 14 while loading plugin "sudoers_policy" sudo: unable to load /usr/lib/sudoers.so: /lib/libcrypt.so.1: version `XCRYPT_2.0' not found (required by /usr/lib/sudoers.so)
Ambarella sshd[14584]: /usr/sbin/sshd: relocation error: /usr/sb in/sshd: symbol EVP_KDF_ctrl version OPENSSL_1_1_1b not defined in file libcrypt o.so.1.1 with link time reference應該是系統原來就有 libcrypt，我用另一個版本覆蓋了導致。
./configure --enable-openssl=/home/pi/openssl --prefix=/home/pi/sudoinstall先 disable 全部..
--disable-shared
Disable dynamic shared object support. By default, sudo
is built with a plugin API capable of loading arbitrary
policy and I/O logging plugins. If the --disable-shared
option is specified, this support is disabled and the default
sudoers policy and I/O plugins are embedded in the sudo
binary itself. This will also disable the noexec option
as it too relies on dynamic shared object support.
--disable-shared-libutil
Disable the use of the dynamic libsudo_util library. By
default, sudo, the sudoers plugin and the associated sudo
utilities are linked against a shared version of libsudo_util.
If the --disable-shared-libutil option is specified, a
static version of the libsudo_util library will be used
instead. This option may only be used in conjunction with
the --enable-static-sudoers option.
--enable-static-sudoers
By default, the sudoers plugin is built and installed as a
dynamic shared object. When the --enable-static-sudoers
option is specified, the sudoers plugin is compiled directly
into the sudo binary. Unlike --disable-shared, this does
not prevent other plugins from being used and the noexec
option will continue to function.
一樣，都 disable，也 disable openssl，結果一樣要 XCRYOT_2.0，只插在 /etc/sudo,conf 不用了。PIL.UnidentifiedImageError: cannot identify image filegoogle 一下，有人說用
import os
from PIL import Image
folder_path = 'data\img'
extensions = []
for fldr in os.listdir(folder_path):
sub_folder_path = os.path.join(folder_path, fldr)
for filee in os.listdir(sub_folder_path):
file_path = os.path.join(sub_folder_path, filee)
print('** Path: {} **'.format(file_path), end="\r", flush=True)
im = Image.open(file_path)
rgb_im = im.convert('RGB')
if filee.split('.')[1] not in extensions:
extensions.append(filee.split('.')[1])
檢查 image 是不是合格。Traceback (most recent call last):in/cats/666.jpg ** File "checkimage.py", line 10, in用 mediainfo 看 666.jpg，沒有內容。一看 file size 是 0im = Image.open(file_path) File "/home/charles-chang/miniconda3/envs/tensorflow-gpu/lib/python3.8/site-packages/PIL/Image.py", line 2967, in open raise UnidentifiedImageError( PIL.UnidentifiedImageError: cannot identify image file './cats_and_dogs_small/train/cats/666.jpg'
-Wdate-time
Warn when macros "__TIME__", "__DATE__" or "__TIMESTAMP__"
are encountered as they might prevent bit-wise-identical
reproducible compilations.
這個好像是為了 reproducible build。
config FEATURE_SUID_CONFIG
bool "Enable SUID configuration via /etc/busybox.conf"
default y
depends on FEATURE_SUID
help
Allow the SUID/SGID state of an applet to be determined at runtime
by checking /etc/busybox.conf. (This is sort of a poor man's sudo.)
The format of this file is as follows:
APPLET = [Ssx-][Ssx-][x-] [USER.GROUP]
s: USER or GROUP is allowed to execute APPLET.
APPLET will run under USER or GROUP
(regardless of who's running it).
S: USER or GROUP is NOT allowed to execute APPLET.
APPLET will run under USER or GROUP.
This option is not very sensical.
x: USER/GROUP/others are allowed to execute APPLET.
No UID/GID change will be done when it is run.
-: USER/GROUP/others are not allowed to execute APPLET.
An example might help:
|[SUID]
|su = ssx root.0 # applet su can be run by anyone and runs with
| # euid=0,egid=0
|su = ssx # exactly the same
|
|mount = sx- root.disk # applet mount can be run by root and members
| # of group disk (but not anyone else)
| # and runs with euid=0 (egid is not changed)
|
|cp = --- # disable applet cp for everyone
The file has to be owned by user root, group root and has to be
writeable only by root:
(chown 0.0 /etc/busybox.conf; chmod 600 /etc/busybox.conf)
The busybox executable has to be owned by user root, group
root and has to be setuid root for this to work:
(chown 0.0 /bin/busybox; chmod 4755 /bin/busybox)
Robert 'sandman' Griebl has more information here: