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Martin Hope
Bussller
Asked: 2019-01-20 06:20:45 +0800 CST
  • 2

我已经安装了 rustcurl https://sh.rustup.rs -sSf | sh并按照其中的说明进行操作。安装成功，PATH添加.bash_profile如下：

export PATH=$HOME/.cargo/bin:$PATH

echo$PATH显示变量已正确设置，如下：

rust@rusty:~$ echo $PATH
/home/rust/.cargo/bin:/usr/local/bin:/usr/bin:/bin:/usr/games

我/home作为一个单独的分区安装并通过/etc/fstab如下方式安装

# Mounting home partition
/dev/sda4                 /home                 ext4      rw,async,users      0 0

我最初有noexec作为选项之一。但是，删除它并没有给结果带来任何变化。

我怀疑我的默认/home分区权限，但没有任何其他 linux 运行框可以验证。

total 20
drwx------  2 root     root     16384 Jan 18 08:38 lost+found
drwxr-xr-x 22 rust     rust     4096  Jan 19 19:45 rust

这个权限正确吗？

如果有人可以阐明我缺少注意/做错了什么以及如何解决和解决问题，将不胜感激。

在@kusalananda 发表评论后实现

编辑-1

rust@rusty:~$ cargo
bash: /home/rust/.cargo/bin/cargo: Permission denied

它应该提示我提供帮助文档，cargo但未能说出上述内容。

EDIT-2.cargo添加了和 的权限.cargo/bin

rust@rusty:~$ ls -l .cargo/
total 8
drwxr-xr-x 2 rust rust 4096 Jan 19 18:45 bin
-rw-r--r-- 1 rust rust   37 Jan 19 18:58 env
rust@rusty:~$ ls -l .cargo/bin/
total 108560
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 cargo
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 cargo-clippy
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 cargo-fmt
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 rls
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 rustc
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 rustdoc
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 rustfmt
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 rust-gdb
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 rust-lldb
-rwxr-xr-x 10 rust rust 11116056 Jan 19 18:45 rustup

编辑-3：

>> curl https://sh.rustup.rs -sSf | sh
info: downloading installer

Welcome to Rust!

This will download and install the official compiler for the Rust programming 
language, and its package manager, Cargo.

It will add the cargo, rustc, rustup and other commands to Cargo's bin 
directory, located at:

  /home/rusty/.cargo/bin

This path will then be added to your PATH environment variable by modifying the
profile files located at:

  /home/rusty/.profile
  /home/rusty/.bash_profile

You can uninstall at any time with rustup self uninstall and these changes will
be reverted.

Current installation options:

   default host triple: x86_64-unknown-linux-gnu
     default toolchain: stable
  modify PATH variable: yes

1) Proceed with installation (default)
2) Customize installation
3) Cancel installation
>1

info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: latest update on 2019-01-17, rust version 1.32.0 (9fda7c223 2019-01-16)
info: downloading component 'rustc'
 79.5 MiB /  79.5 MiB (100 %) 883.2 KiB/s ETA:   0 s                
info: downloading component 'rust-std'
 54.3 MiB /  54.3 MiB (100 %) 611.2 KiB/s ETA:   0 s                
info: downloading component 'cargo'
  4.4 MiB /   4.4 MiB (100 %) 761.4 KiB/s ETA:   0 s                
info: downloading component 'rust-docs'
  8.5 MiB /   8.5 MiB (100 %) 553.6 KiB/s ETA:   0 s                
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: installing component 'rust-docs'
info: default toolchain set to 'stable'

  stable installed - (error reading rustc version)


Rust is installed now. Great!

To get started you need Cargo's bin directory ($HOME/.cargo/bin) in your PATH 
environment variable. Next time you log in this will be done automatically.

To configure your current shell run source $HOME/.cargo/env
permissions fstab
Martin Hope
Bussller
Asked: 2018-09-22 19:13:12 +0800 CST
  • 2

伙计们，

find由nobody 执行的每次新启动时都会自动运行（早上我启动系统时）。我想这与updatedb. 我怎样才能确认我的假设并阻止它自动执行。我的ps aux | grep find输出如下：

~~> ps aux | grep find
root      4492  0.0  0.0   4288   748 ?        SN   08:10   0:00 /bin/sh /usr/bin/updatedb.findutils
root      4500  0.0  0.0   4288   108 ?        SN   08:10   0:00 /bin/sh /usr/bin/updatedb.findutils
root      4526  0.0  0.0  55444  2988 ?        SN   08:10   0:00 su nobody -s /bin/sh -c /usr/bin/find / -ignore_readdir_race      \( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype afs -o -fstype binfmt_misc -o -fstype proc -o -fstype smbfs -o -fstype autofs -o -fstype iso9660 -o -fstype ncpfs -o -fstype coda -o -fstype devpts -o -fstype ftpfs -o -fstype devfs -o -fstype mfs -o -fstype shfs -o -fstype sysfs -o -fstype cifs -o -fstype lustre_lite -o -fstype tmpfs -o -fstype usbfs -o -fstype udf -o -fstype ocfs2 -o      -type d -regex '\(^/tmp$\)\|\(^/usr/tmp$\)\|\(^/var/tmp$\)\|\(^/afs$\)\|\(^/amd$\)\|\(^/alex$\)\|\(^/var/spool$\)\|\(^/sfs$\)\|\(^/media$\)\|\(^/var/lib/schroot/mount$\)' \) -prune -o -print0
nobody    4538  0.0  0.0   4288   748 ?        SNs  08:10   0:00 sh -c /usr/bin/find / -ignore_readdir_race      \( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype afs -o -fstype binfmt_misc -o -fstype proc -o -fstype smbfs -o -fstype autofs -o -fstype iso9660 -o -fstype ncpfs -o -fstype coda -o -fstype devpts -o -fstype ftpfs -o -fstype devfs -o -fstype mfs -o -fstype shfs -o -fstype sysfs -o -fstype cifs -o -fstype lustre_lite -o -fstype tmpfs -o -fstype usbfs -o -fstype udf -o -fstype ocfs2 -o      -type d -regex '\(^/tmp$\)\|\(^/usr/tmp$\)\|\(^/var/tmp$\)\|\(^/afs$\)\|\(^/amd$\)\|\(^/alex$\)\|\(^/var/spool$\)\|\(^/sfs$\)\|\(^/media$\)\|\(^/var/lib/schroot/mount$\)' \) -prune -o -print0
nobody    4539  7.9  0.0  16844  2752 ?        DN   08:10   0:06 /usr/bin/find / -ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype afs -o -fstype binfmt_misc -o -fstype proc -o -fstype smbfs -o -fstype autofs -o -fstype iso9660 -o -fstype ncpfs -o -fstype coda -o -fstype devpts -o -fstype ftpfs -o -fstype devfs -o -fstype mfs -o -fstype shfs -o -fstype sysfs -o -fstype cifs -o -fstype lustre_lite -o -fstype tmpfs -o -fstype usbfs -o -fstype udf -o -fstype ocfs2 -o -type d -regex \(^/tmp$\)\|\(^/usr/tmp$\)\|\(^/var/tmp$\)\|\(^/afs$\)\|\(^/amd$\)\|\(^/alex$\)\|\(^/var/spool$\)\|\(^/sfs$\)\|\(^/media$\)\|\(^/var/lib/schroot/mount$\) ) -prune -o -print0
cathyserver  5223  0.0  0.0  13380   940 pts/1    S+   08:12   0:00 grep find

第一印象是某个守护进程正在寻找/var /tmp /var/spool /alex /amd /afs /var/tmp某事。如何找到执行此操作的进程/守护进程？这是任何网络服务器吗？顺便说一句，我的系统中没有任何/alex /amd目录。

find background-process
Martin Hope
Bussller
Asked: 2017-12-19 08:00:44 +0800 CST
  • 0

伙计们，

我遇到了一个奇怪的问题。我在 thinkpad t430 上运行 Debian stretch。当我尝试使用我的集成网络摄像头捕捉视频时，我可以观看流媒体视频，如果我

xawtv -c /dev/video0

而不是当我发布时，

mplayer tv://

我得到的错误是，

--> mplayer tv://
MPlayer 1.3.0 (Debian), built with gcc-6.2.1 (C) 2000-2016 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing tv://.
TV file format detected.
Selected driver: v4l2
 name: Video 4 Linux 2 input
 author: Martin Olschewski <[email protected]>
 comment: first try, more to come ;-)
v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead.
Selected device: Integrated Camera
 Capabilities:  video capture  streaming
 supported norms:
 inputs: 0 = Camera 1;
 Current input: 0
 Current format: YUYV
tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
v4l2: ioctl enum norm failed: Inappropriate ioctl for device
Error: Cannot set norm!
Selected input hasn't got a tuner!
v4l2: ioctl set mute failed: Invalid argument
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
Movie-Aspect is undefined - no prescaling applied.
VO: [vdpau] 640x480 => 640x480 Packed YUY2 
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
==========================================================================
Audio: no sound
Starting playback...
v4l2: select timeout
libvdpau-va-gl: VideoSurface::PutBitsYCbCr_glsl(): not implemented source YCbCr format 'VDP_YCBCR_FORMAT_YUYV'
[vdpau] Error when calling vdp_video_surface_put_bits_y_cb_cr: VDP_STATUS_INVALID_Y_CB_CR_FORMAT


MPlayer interrupted by signal 11 in module: filter_video
- MPlayer crashed by bad usage of CPU/FPU/RAM.
  Recompile MPlayer with --enable-debug and make a 'gdb' backtrace and
  disassembly. Details in DOCS/HTML/en/bugreports_what.html#bugreports_crash.
 [ This binary of MPlayer in Debian is currently compiled with
   '--enable-debug'; the debugging symbols are in the package
   'mplayer-dbgsym'.]

谁能解释一下为什么 mplayer 因上述错误而崩溃，而 xawtv 能够显示？

任何调试和解决问题的帮助将不胜感激。

我已经安装并运行了视频 4 linux 2 (v4l2)默认内核带有 debian 拉伸并通过更新到最新apt

我的v4l2-ctl --list-devices说：

Integrated Camera (usb-0000:00:1a.0-1.6):
/dev/video0
debian camera