NVIDIA is providing a user-space daemon on Linux to support persistence of driver state across Cuda job runs. The daemon approach provides a more elegant and robust solution to this problem than persistence mode.

NVIDIA will support both solutions for the near future (likely through Cuda 8.0), but will focus all future development and bug fixes on the daemon.

The daemon is installed in /usr/bin, while sample installation and init scripts are included with the driver in the documentation directory. The scripts are provided as a guide for installing the daemon to run on system startup for some common init systems; they may require some changes for certain distributions, due to the wide variety of init system configurations.

NVIDIA encourages customers to shift to this daemon approach at their earliest availability.

Supported Environments

• Drivers: R319 and higher
• OSes: All standard driver-supported Linux platforms
• GPUs: All shipping Tesla, Quadro and GRID products

Implementation Details

On Linux systems running the NVIDIA GPU driver, clients attach a GPU by opening its device file. Conversely, the GPU is detached by closing the device file. The GPU state remains loaded in the driver whenever one or more clients have the device file open. Once all clients have closed the device file, the GPU state will be unloaded unless persistence mode is enabled.

这是由于 systemd-timesyncd 被误认为是一个用户 ID 而不是进程名。 使用 ps -ef 命令可以发现该问题。例如：

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root     20366   779  0 21:05 ?        00:00:00 [autocleanStatus] <defunct>
root     20385   757  0 21:05 ?        00:00:00 sshd: git [priv]
<long hang>
62583    20396     1  2 21:06 ?        00:00:00 /lib/systemd/systemd-timesyncd

要解决该问题，一般重启即可。 也可以禁用 systemd-timesyncd 服务。

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sudo systemctl stop systemd-timesyncd
sudo systemctl disable systemd-timesyncd

要想恢复被禁用的服务，可以使用：

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sudo systemctl enable systemd-timesyncd
sudo systemctl start systemd-timesyncd

在使用 Dell 服务器的过程中，如果可以进入系统，但是忘记 iDRAC 卡的地址，可以使用 ipmitool 这个工具来获取一下硬件信息，从而获得 iDRAC 地址。

IPMI（Intelligent Platform Management Interface）即智能平台管理接口,是使硬件管理具备“智能化”的新一代通用接口标准。 用户可以利用 IPMI 监视服务器的物理特征，如温度、电压、电扇工作状态、电源供应以及机箱入侵等。

安装 impitool：

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sudo apt install impitool

配置启用：

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sudo modprobe ipmi_msghandler
sudo modprobe ipmi_devintf
sudo modprobe ipmi_si

接着，使用如下命令查看 iDRAC 地址：

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ipmitool lan print

解决办法

使用 chattr 删除 ia 参数：

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chattr -ia files...

chattr 命令

chattr 命令用于改变文件属性，这些属性共有以下8种模式：

• a 让文件或目录仅供附加用途。
• b 不更新文件或目录的最后存取时间。
• c 将文件或目录压缩后存放。
• d 将文件或目录排除在倾倒操作之外。
• i 不得任意更动文件或目录。
• s 保密性删除文件或目录。
• S 即时更新文件或目录。
• u 预防意外删除。

语法

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chattr [ -RVf ] [ -v version ] [ -p project ] [ mode ] files...

参数

• -R 递归处理，将指定目录下的所有文件及子目录一并处理。
• -V 显示指令执行过程。
• -f 忽略大多数错误信息。
• -v version 设置文件或目录版本。
• -p project 设置文件或目录项目编号。
• +<mode> 开启文件或目录的该项属性。
• -<mode> 关闭文件或目录的该项属性。
• =<mode> 指定文件或目录的该项属性。

Task: Ubuntu Start Cron Service

To start the cron service, use:

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sudo /etc/init.d/cron start

OR

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sudo service cron start

Task: Ubuntu Stop Cron Service

To stop the cron service, use:

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sudo /etc/init.d/cron stop

OR

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sudo service cron stop

Task: Ubuntu Restart Cron Service

To restart the cron service, use:

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sudo /etc/init.d/cron restart

OR

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sudo service cron restart

conda clean

Remove unused packages and caches.

Options:

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usage: conda clean [-h] [-a] [-i] [-p] [-t] [-f]
                   [-c [TEMPFILES [TEMPFILES ...]]] [-l] [-d] [--json] [-q]
                   [-v] [-y]

Removal Targets

-a, --all

Remove index cache, lock files, unused cache packages, and tarballs.

-i, --index-cache

Remove index cache.

-p, --packages

Remove unused packages from writable package caches.

-t, --tarballs

Remove cached package tarballs.

-f, --force-pkgs-dirs

Remove all writable package caches. This option is not included with the --all flag.

-c, --tempfiles

Remove temporary files that could not be deleted earlier due to being in-use. Argument is path(s) to prefix(es) where files should be found and removed.

-l, --logfiles

Remove log files.

If you use Adobe software on Windows, you may run into an issue where you get a logtransport2 error on shutdown of Windows. The issue is probably that the LogTransport2.exe can't connect to its servers to send log data. Adobe offers you a way to opt-out of a few privacy settings through your online account, and once those changes sync back into your Adobe software suite, the Logtransport2 error on shutdown should be fixed.

In an Adobe app or the Creative Cloud app you can click on your profile icon then click on Adobe Account. As of this article, you can also go directly to your Adobe Account Privacy Settings. To fix the LogTransport2.exe error, you'll need to uncheck the box under Desktop And App Usage that says

Yes, I'd like to share information on how I use Adobe desktop apps.

As a privacy best practice, it is also recommended that you uncheck the box under Machine Learning that says

Yes, allow my content to be analyzed by Adobe using machine learning techniques.

Once you make these changes, you shouldn't get the LogTransport2 error when shutting down or rebooting Windows.

When using os.rename() to try to move files between drives, you will receive this error:

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OSError: [WinError 17] The system cannot move the file to a different disk drive

This is because os.rename() changes the path of the file but doesn't move its actual data on the disk. this is why you can't move (rename) it from one drive to another.

Moving between drives is actually copy it first, and then delete the source file. you can use shutil.move() method, which do it when you trying to transfer files between two drives.

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import shutil

shutil.move(src, dest)

问题描述

在 Ubuntu 执行 sudo apt-get 时，出现了 dpkg: error processing package *** (--configure) 的错误。

解决方案

通过执行下面的命令可能可以解决该问题：

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sudo mv /var/lib/dpkg/info/ /var/lib/dpkg/info_old/

sudo mkdir /var/lib/dpkg/info/

sudo apt-get update

sudo apt-get -f install

sudo mv /var/lib/dpkg/info/* /var/lib/dpkg/info_old/

sudo rm -rf /var/lib/dpkg/info

sudo mv /var/lib/dpkg/info_old/ /var/lib/dpkg/info/

Use the following command to recursively rename files matching a specific pattern (file* here).

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find . -type f -name 'file*' -execdir mv {} {}_renamed ';'