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sudo dd if=xxx.iso of=/dev/sdX bs=4M conv=fsync oflag=direct status=progress

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curl https://pyenv.run | bash
sudo apt install -y \
    wget \
    build-essential \
    libreadline-dev \
    libncursesw5-dev \
    libssl-dev \
    libsqlite3-dev \
    tk-dev \
    libgdbm-dev \

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openssl s_client -connect www.example.com:443 </dev/null 2>/dev/null | openssl x509 -inform pem -text

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gist of consistent hashing

Resolve rebalance problem of dynamic cluster. Key techniques:

• determine hash space, eg 2 * PI or 16K like redis
• map keys and nodes to the same hash space using hash function(s)
• keys are placed on the first node with hash value greater than the key, or on the first node
• use binary search tree to speed up locating the node for a paticular key
• when new node joins, move keys with hash value smaller than the new node from its successor to the node
• when existing node leaves, move keys on this node to its successor

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# virtualbox 6.1.36 and vagrant 2.3.0 are broken
# instruction to downgrade to working versions

curl https://archive.archlinux.org/packages/v/virtualbox/virtualbox-6.1.32-2-x86_64.pkg.tar.zst -o virtualbox-6.1.32-2-x86_64.pkg.tar.zst
sudo pacman -U virtualbox-6.1.32-2-x86_64.pkg.tar.zst

curl https://archive.archlinux.org/packages/v/virtualbox-guest-iso/virtualbox-guest-iso-6.1.32-1-any.pkg.tar.zst -o virtualbox-guest-iso-6.1.32-1-any.pkg.tar.zst
sudo pacman -U virtualbox-guest-iso-6.1.32-1-any.pkg.tar.zst

curl https://archive.archlinux.org/packages/v/vagrant/vagrant-2.2.19-2-x86_64.pkg.tar.zst -o vagrant-2.2.19-2-x86_64.pkg.tar.zst

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Jobs or pipelines run unexpectedly when using changes:

You might have jobs or pipelines that run unexpectedly when using rules: changes
or only: changes without
merge request pipelines.
Pipelines on branches or tags that don't have an explicit association with a merge request
use a previous SHA to calculate the diff. This calculation is equivalent to git diff HEAD~
and can cause unexpected behavior, including:

The changes rule always evaluates to true when pushing a new branch or a new tag to GitLab.

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Problem statement

The command "mvn dependency:resolve" and "mvn dependency:resolve-plugins" fails on internal dependency on a multi-module project. It defeats the attempt to create a dependency layer and increase docker build speed when only application code is changed.

COPY pom.xml .

COPY powerjob-server-remote/pom.xml powerjob-server-remote/pom.xml

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The vim macro:

ea.��ýaldf(f,r=ldf";D0guw

converts ErrorCode:

SYSTEM_ERROR                              (1, "系统错误"),
DB_ERROR                                  (2, "数据库错误"),
PARAM_ERROR                               (10, "参数错误"),

OPTIMISTIC_LOCK_ERROR (100, "并发乐观锁错误"),

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#!/bin/sh

# Check to see if we're already running the session
tmux has-session -t main &> /dev/null

if [ $? != 0 ] ; then
    # Create overall tmux session
    tmux new-session -d -s main -n java > /dev/null

    tmux split-window -v

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Grub got some needed security updates 62. Note that os-prober is now disabled by default for security reasons: broken patch 36; fixed patch 57. More infos about it here 167. To restore the old behavior, open a terminal and issue

sudo echo GRUB_DISABLE_OS_PROBER=false >> /etc/default/grub && sudo update-grub