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A simple Ghostscript command to merge two PDFs in a single file is shown below:
gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=combine.pdf -dBATCH 1.pdf 2.pdf
Install Ghostscript:
Type the command sudo apt-get install ghostscript
to download and install the ghostscript package and all of the packages it depends on.
Before starting, make sure you have a backup, and make sure to have a linux live boot ready to rescue your system. It's easy to mess this up!
- Use gdisk to convert the partition table to GPT.
gdisk /dev/sda
- Create the "BIOS boot" partition that GRUB needs.
n
to create a new partition. Needs to be about 1MB. You can probably squeeze this in from sectors 34-2047. UseL
orl
to look up the code for "BIOS boot" (ef02). - Write the new partition table.
w
- Reload the partition table.
>
partprobe /dev/sda
/** | |
* Encrypts plaintext using AES-GCM with supplied password, for decryption with aesGcmDecrypt(). | |
* (c) Chris Veness MIT Licence | |
* | |
* @param {String} plaintext - Plaintext to be encrypted. | |
* @param {String} password - Password to use to encrypt plaintext. | |
* @returns {String} Encrypted ciphertext. | |
* | |
* @example | |
* const ciphertext = await aesGcmEncrypt('my secret text', 'pw'); |
- http://stackoverflow.com/questions/804115 (
rebase
vsmerge
). - https://www.atlassian.com/git/tutorials/merging-vs-rebasing (
rebase
vsmerge
) - https://www.atlassian.com/git/tutorials/undoing-changes/ (
reset
vscheckout
vsrevert
) - http://stackoverflow.com/questions/2221658 (HEAD^ vs HEAD~) (See
git rev-parse
) - http://stackoverflow.com/questions/292357 (
pull
vsfetch
) - http://stackoverflow.com/questions/39651 (
stash
vsbranch
) - http://stackoverflow.com/questions/8358035 (
reset
vscheckout
vsrevert
)
source: http://www.skorks.com/2009/09/bash-shortcuts-for-maximum-productivity/
- Ctrl + a – go to the start of the command line
- Ctrl + e – go to the end of the command line
- Ctrl + k – delete from cursor to the end of the command line
- Ctrl + u – delete from cursor to the start of the command line
- Ctrl + w – delete from cursor to start of word (i.e. delete backwards one word)
- Ctrl + y – paste word or text that was cut using one of the deletion shortcuts (such as the one above) after the cursor
// check version | |
node -v || node --version | |
// list locally installed versions of node | |
nvm ls | |
// list remove available versions of node | |
nvm ls-remote | |
// install specific version of node |
国内从 Docker Hub 拉取镜像有时会遇到困难,此时可以配置镜像加速器。Docker 官方和国内很多云服务商都提供了国内加速器服务。
Dockerized 实践 https://github.com/y0ngb1n/dockerized
Ubuntu 16.04+、Debian 8+、CentOS 7+