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Restarting cron after changing crontab file?
...ad cron.service: Job type reload is not applicable for unit cron.service. (Ubuntu 18.04). Read: Heads off, we all are pwned by the syndrome: "SystemD, there can be only one". If reload is not done automagically behind the scenes, you are bust! Do not even think about fixing it, like you did for t...
Android Left to Right slide animation
...this xml in res/anim/
This is for left to right animation:
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<translate android:fromXDelta="-100%" android:toXDelta="0%"
android:fromYDelta="0%" android:toYDelta="0%"
...
Bash: Syntax error: redirection unexpected
...ce /bin/bash or /bin/sh in its hash bang line? The default system shell in Ubuntu is dash, not bash, so if you have #!/bin/sh then your script will be using a different shell than you expect. Dash does not have the <<< redirection operator.
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How accurate is python's time.sleep()?
...p if it wakes you up early.
I should also mention that if you are running Ubuntu you can try out a pseudo real-time kernel (with the RT_PREEMPT patch set) by installing the rt kernel package (at least in Ubuntu 10.04 LTS).
EDIT: Correction non-realtime Linux kernels have minimum sleep interval muc...
How to create a Custom Dialog box in android?
...og.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:background="#3E80B4"
android:orientation="vertical" >
<TextView
a...
Put buttons at bottom of screen with LinearLayout?
...out_weight="0"
You've set the gravity properly on your inner LinearLayout: android:gravity="center|bottom"
Notice that fill_parent does not mean "take up all available space". However, if you use layout_height="0dp" with layout_weight="1", then a view will take up all available space (Can't get pr...
Add shadow to custom shape on Android
Is it possible to add a drop shadow to a custom shape in Android? After looking through the documentation, I only see a way to apply a text shadow.
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...题设计与最佳实践
完整实战项目：智能温室控制系统
项目概述
系统架构设计
1. 主题设计策略
2. 连接管理与重连机制
3. 传感器数据处理
4. 控制指令发布
5. 数据可视化和历史记录
6...
How can I create a table with borders in Android?
..._shape.xml
<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape= "rectangle" >
<solid android:color="#000"/>
<stroke android:width="1dp" android:color="#ff9"/>
</shape>
layout/m...
The command rbenv install is missing
In Ubuntu 10.04 I just installed rbenv .
The install command is not present.
8 Answers
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