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              B A S H   C H E A T   S H E E T    
   
 to page output forward (only): command filename | more 
 to page output forward & back: command filename | less
 to print a dataset: lp datasetname (-d printerid) (-o landscape)

 USE OF QUOTATION MARKS
    echo "$varname"    =   echo The value of \$varname is \"$varname\"
                       =   echo "The value of \$varname is \"$varname\"."
    $fred='Four spaces between these    words.'

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echo '[Unit]
Description=High-performance, schema-free document-oriented database
After=syslog.target network.target
 
[Service]
User=mongodb
Group=mongodb
ExecStart=/usr/bin/mongod -f /etc/mongod.conf
 
[Install]

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Choose archetype:
1: remote -> br.gov.frameworkdemoiselle.archetypes:demoiselle-jsf-jpa (Archetype for web applications (JSF + JPA) using Demoiselle Framework)
2: remote -> br.gov.frameworkdemoiselle.archetypes:demoiselle-minimal (Basic archetype for generic applications using Demoiselle Framework)
3: remote -> co.ntier:spring-mvc-archetype (An extremely simple Spring MVC archetype, configured with NO XML.)
4: remote -> com.agilejava.docbkx:docbkx-quickstart-archetype (-)
5: remote -> com.alibaba.citrus.sample:archetype-webx-quickstart (-)
6: remote -> com.bsb.common.vaadin:com.bsb.common.vaadin.embed-simple-archetype (-)
7: remote -> com.bsb.common.vaadin:com.bsb.common.vaadin7.embed-simple-archetype (-)
8: remote -> com.cedarsoft.open.archetype:multi (-)
9: remote -> com.cedarsoft.open.archetype:simple (-)

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>group</groupId>
	<artifactId>dummy</artifactId>
	<name>Dummy Project</name>
	<version>1.0.12</version>
	<packaging>pom</packaging>
	<scm>
		<connection>scm:git:https://......</connection>
		<tag>HEAD</tag>

ssledz

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r 

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#!/bin/bash

IDEA=`tar -tzf $1 | head -1 | cut -f1 -d"/"`

sudo tar -xf $1 -C /opt/
sudo chown $(whoami):$(whoami) /opt/$IDEA -R

sudo rm /opt/idea-IU 
sudo ln -s /opt/$IDEA /opt/idea-IU
sudo chown $(whoami):$(whoami) /opt/idea-IU 

ssledz

This approach uses update-alternatives to manage GCC and LLVM/CLANG C/C++ compiler toolchains. Although tested on Linux Mint 18.3, this approach should work on any Debian based distro or for that matter any Linux distro with update-alternatives support, provided the packages are installed correctly.

There are 3 files

• gcc-alternatives.sh installs GCC versions 5/6/7 and sets up alternatives for gcc/g++/cpp/gfortran.
• llvm-clang-alternatives.sh installs LLVM and CLANG versions 4/5 and sets up alternatives for various LLVM and CLANG programs including clang and clang++.
• cc-alternatives.sh sets up alternatives for the cc, cxx, and the ld commands. This script can be used to change systemwide default compiler/linker combination to either GCC or CLANG.

Once these scripts are run you can change the system GCC/CLANG versions by running sudo update-alternatives --config gcc|clang. To change the default compiler/linker combo used by t

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spacemacs-keybindings

Ref: https://gist.github.com/rnwolf/e09ae9ad6d3ac759767d129d52cab1f1

Key Binding	Description
SPC	< space >
RET	< return >
C	< ctrl >
M	< alt >, M stands for Meta

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(use-package lsp-haskell
  :config
  (setq lsp-haskell-process-path-hie "haskell-language-server-wrapper")
  ;; xref backends don't compose.  This creates one that first consults the
  ;; xref-lsp backend for the latest information from the language server,
  ;; and then falls through to etags for library definitions.
  (defun my/xref-lsp-etags-backend () 'my/lsp-etags)
  (cl-defmethod xref-backend-identifier-at-point ((_backend (eql my/lsp-etags)))
    (xref-backend-identifier-at-point 'xref-lsp))