nguyensach · September 7, 2018 03:23 · Mar 24, 2018 · Mar 13, 2018 · Mar 13, 2018 · Mar 13, 2018
diff --git a/vim.md b/vim.md
@@ -144,4 +144,9 @@ Create file: `%`
 
 ### NERDTree
 
-Toggle sidebar: `:NERDTreeToggle`
+Toggle sidebar: `:NERDTreeToggle`
+
+
+### CtrlP
+
+Switch from file to file: `ctrl + p`
diff --git a/vim.md b/vim.md
@@ -11,6 +11,9 @@ Vim CLI Basics
 ## Config
 Custom config: `~/.vimrc`
 
+## Colorschemes
+- https://github.com/rakr/vim-one
+
 ## Commands 
 
 ### Navigation

diff --git a/vim.md b/vim.md
@@ -8,9 +8,6 @@ Vim CLI Basics
 ## Cheatsheet
 - https://vim.rtorr.com/
 
-## MacVim
-Open app: `mvim`
-
 ## Config
 Custom config: `~/.vimrc`
 
@@ -50,6 +47,9 @@ Jump to beginning of the file: `gg`
 
 Jump to end of the file: `G`
 
+Browser current working directory: `:e .`
+(allows browsing and searching with `/`)
+
 Search word: `/` (Use `n` and `N` to navigate)
 
 Insert as new line: `o` and `O`
@@ -104,4 +104,41 @@ Jump down: `ctrl + j`
 
 Jump left: `ctrl + h`
 
-Jump right: `ctrl + l`
+Jump right: `ctrl + l`
+
+
+## Apps
+
+### MacVim
+
+Open app: `mvim`
+
+
+## Plugins
+
+
+### Vundle
+
+Download: https://github.com/VundleVim/Vundle.vim
+
+Command: `:PluginInstall`
+
+
+### Vinegar
+
+Browser current working directory: `-`
+
+Go up one folder: `-`
+
+Create directory: `d`
+
+Delete directory: `D` (asks for confirmation)
+
+Delete selected file: `D` (asks for confirmation)
+
+Create file: `%`
+
+
+### NERDTree
+
+Toggle sidebar: `:NERDTreeToggle`
diff --git a/vim.md b/vim.md
@@ -8,6 +8,9 @@ Vim CLI Basics
 ## Cheatsheet
 - https://vim.rtorr.com/
 
+## MacVim
+Open app: `mvim`
+
 ## Config
 Custom config: `~/.vimrc`
 

diff --git a/vim.md b/vim.md
@@ -57,6 +57,8 @@ Replace char: `r`
 
 Delete: `d`
 
+Cut whole line: `dd`
+
 Cut text e.g. next word: `dw`
 
 Undo: `u`

diff --git a/vim.md b/vim.md
@@ -85,6 +85,8 @@ Force quit (without saving): `ESC` + `:q!`
 
 Source current file: `:so %`
 
+Compare two files: `vim -d index1.php index2.php`
+
 ### Split view
 
 Horizontal split: `:sp`

diff --git a/vim.md b/vim.md
@@ -83,4 +83,18 @@ Save and exit: `ESC` + `:x`
 
 Force quit (without saving): `ESC` + `:q!`
 
-Source current file: `:so %`
+Source current file: `:so %`
+
+### Split view
+
+Horizontal split: `:sp`
+
+Vertical split: `:vsp`
+
+Jump up: `ctrl + k`
+
+Jump down: `ctrl + j`
+
+Jump left: `ctrl + h`
+
+Jump right: `ctrl + l`
diff --git a/vim.md b/vim.md
@@ -5,6 +5,9 @@ Vim CLI Basics
 ## Related tutorial
 - https://laracasts.com/series/vim-mastery
 
+## Cheatsheet
+- https://vim.rtorr.com/
+
 ## Config
 Custom config: `~/.vimrc`
 

diff --git a/vim.md b/vim.md
@@ -54,7 +54,7 @@ Replace char: `r`
 
 Delete: `d`
 
-Cut text e.g. next word: `dw` (use `p` to paste in again)
+Cut text e.g. next word: `dw`
 
 Undo: `u`
 
@@ -64,6 +64,12 @@ Repeat last command: `.`
 
 Switch to visual mode: `v` and `V` (select entire line)
 
+Copy selected: `y`
+
+Copy entire line: `yy`
+
+Paste: `p`
+
 Save changes: `:w`
 
 Quit Vim: `:q`

diff --git a/vim.md b/vim.md
@@ -2,14 +2,15 @@ Vim CLI Basics
 ===============
 
 
-## Related tutorials
+## Related tutorial
 - https://laracasts.com/series/vim-mastery
 
 ## Config
 Custom config: `~/.vimrc`
 
 ## Commands 
-Startup vim: `vim filename.txt`
+
+### Navigation
 
 Insert mode: `i`
 

diff --git a/vim.md b/vim.md
@@ -1,6 +1,14 @@
 Vim CLI Basics
 ===============
 
+
+## Related tutorials
+- https://laracasts.com/series/vim-mastery
+
+## Config
+Custom config: `~/.vimrc`
+
+## Commands 
 Startup vim: `vim filename.txt`
 
 Insert mode: `i`
@@ -39,10 +47,12 @@ Search word: `/` (Use `n` and `N` to navigate)
 
 Insert as new line: `o` and `O`
 
-Delete chars: `x` and `X`
+Cut chars: `x` and `X`
 
 Replace char: `r`
 
+Delete: `d`
+
 Cut text e.g. next word: `dw` (use `p` to paste in again)
 
 Undo: `u`
@@ -51,7 +61,7 @@ Redo: `ctrl + r`
 
 Repeat last command: `.`
 
-Switch to visual editor: `v`
+Switch to visual mode: `v` and `V` (select entire line)
 
 Save changes: `:w`
 
@@ -61,4 +71,6 @@ Quit without saving: `:q!`
 
 Save and exit: `ESC` + `:x`
 
-Force quit (without saving): `ESC` + `:q!`
+Force quit (without saving): `ESC` + `:q!`
+
+Source current file: `:so %`
diff --git a/README.md b/README.md
@@ -159,7 +159,7 @@ Write to file (will overwrite existing content): `cat > sample-filename.txt` (qu
 
 Search for a filename (not content!) in the current directory: `find sample-filename.txt`
 
-Search for a string (not filename!) inside all files in the current directory: `ack "string"`
+Search for a string (not filename!) inside all files in the current directory: `ack "string" --php` ([documentation](https://beyondgrep.com/documentation/))
 
 Search for a string inside all files in the current directory and subdrectories: `grep -r "string" *`
 

diff --git a/README.md b/README.md
@@ -124,6 +124,8 @@ Create symlink: `ln -s source-dirname destination-dirname`
 
 Update symlink: `ln -sfn source-dirname destination-dirname`
 
+Remove symlink: `unlink sample-dirname`
+
 - `-s`: Create a symbolic link.
 - `-f`: If the target file already exists, then unlink it.
 - `-F`: If the target file already exists and is a directory, then remove/overwrite it.

diff --git a/README.md b/README.md
@@ -122,6 +122,8 @@ Browsing directories: `pushd sample-dirname` / `popd` / `dirs`
 
 Create symlink: `ln -s source-dirname destination-dirname`
 
+Update symlink: `ln -sfn source-dirname destination-dirname`
+
 - `-s`: Create a symbolic link.
 - `-f`: If the target file already exists, then unlink it.
 - `-F`: If the target file already exists and is a directory, then remove/overwrite it.

diff --git a/README.md b/README.md
@@ -122,11 +122,11 @@ Browsing directories: `pushd sample-dirname` / `popd` / `dirs`
 
 Create symlink: `ln -s source-dirname destination-dirname`
 
-`-s`: Create a symbolic link.
-`-f`: If the target file already exists, then unlink it.
-`-F`: If the target file already exists and is a directory, then remove/overwrite it.
-`-h`: If the target file or directory is a symbolic link, do not follow it.
-`-n`: Same as `-h`, for compatibility with other `ln` implementations.
+- `-s`: Create a symbolic link.
+- `-f`: If the target file already exists, then unlink it.
+- `-F`: If the target file already exists and is a directory, then remove/overwrite it.
+- `-h`: If the target file or directory is a symbolic link, do not follow it.
+- `-n`: Same as `-h`, for compatibility with other `ln` implementations.
 
 
 

diff --git a/README.md b/README.md
@@ -118,6 +118,17 @@ Checkout directory: `cd sample-dirname`
 Browsing directories: `pushd sample-dirname` / `popd` / `dirs` 
 (see http://unix.stackexchange.com/a/77081)
 
+### Symlinks
+
+Create symlink: `ln -s source-dirname destination-dirname`
+
+`-s`: Create a symbolic link.
+`-f`: If the target file already exists, then unlink it.
+`-F`: If the target file already exists and is a directory, then remove/overwrite it.
+`-h`: If the target file or directory is a symbolic link, do not follow it.
+`-n`: Same as `-h`, for compatibility with other `ln` implementations.
+
+
 
 Files
 -----------

diff --git a/README.md b/README.md
@@ -154,6 +154,10 @@ MD5 hash for files: `md5 sample-filename.txt`
 
 MD5 hash for folders: `tar c folder | md5sum`
 
+Encrypt file: `openssl enc -aes-256-cbc -e -in sample-filename.txt -out sample-encrypted.txt`
+
+Decrypt file: `openssl enc -aes-256-cbc -d -in sample-encrypted.txt -out sample-filename.txt`
+
 
 Server
 -----------

diff --git a/README.md b/README.md
@@ -150,7 +150,9 @@ Search for a string inside all files in the current directory and subdrectories:
 
 Search and replace within file: `sed -i '' 's/original-text/new-text/g' sample-filename.txt`
 
-Validate MD5 hash: `md5 sample-filename.txt` 
+MD5 hash for files: `md5 sample-filename.txt` 
+
+MD5 hash for folders: `tar c folder | md5sum`
 
 
 Server

diff --git a/README.md b/README.md
@@ -150,6 +150,8 @@ Search for a string inside all files in the current directory and subdrectories:
 
 Search and replace within file: `sed -i '' 's/original-text/new-text/g' sample-filename.txt`
 
+Validate MD5 hash: `md5 sample-filename.txt` 
+
 
 Server
 -----------

diff --git a/README.md b/README.md
@@ -1,12 +1,17 @@
-Command Line Crash Course
-===============
+# Command Line Crash Course
 
-Related tutorial: http://cli.learncodethehardway.org/book/
 
-CodeCademy: https://www.codecademy.com/courses/learn-the-command-line
+## Related tutorials
+- http://cli.learncodethehardway.org/book/
+- https://www.codecademy.com/courses/learn-the-command-line
 
-Official cheatsheet: http://cd64.de/linux
 
+## Cheatsheets
+- [Linux auf einem Blatt](http://helmbold.de/artikel/Linux-auf-einem-Blatt.pdf)
+- [Fasd](https://gist.github.com/hofmannsven/a502e525ba9f9e5fe348480183364ad8)
+
+
+## Usage
 Note: Hold option (`alt`) and click a position in the current line to move your cursor to that position. 
 
 Clear history: `ctrl + l`

diff --git a/README.md b/README.md
@@ -206,6 +206,8 @@ Show site IP: `dig +short google.com`
 
 Show A Record: `dig a google.com` (Returns: `google.com.	43	IN	A	123.123.123.123` aka `public-name ttl internet record-type server-address`)
 
+Webservice: https://www.whatsmydns.net/
+
 
 Tools
 -----------

diff --git a/README.md b/README.md
@@ -204,7 +204,7 @@ Check site feedback: `ping google.com`
 
 Show site IP: `dig +short google.com`
 
-Show A Record: `dig a google.com`
+Show A Record: `dig a google.com` (Returns: `google.com.	43	IN	A	123.123.123.123` aka `public-name ttl internet record-type server-address`)
 
 
 Tools

diff --git a/README.md b/README.md
@@ -204,6 +204,8 @@ Check site feedback: `ping google.com`
 
 Show site IP: `dig +short google.com`
 
+Show A Record: `dig a google.com`
+
 
 Tools
 -----------

diff --git a/README.md b/README.md
@@ -97,7 +97,7 @@ List directory (wildcard matching): `ls *.txt`
 List all files of type: `find . -name "*.txt" -print`
 
 
-Switch/toggle between dirs: `cd -`
+Go back to previous directory: `cd -`
 
 
 Make (empty) directory: `mkdir sample-dirname`

diff --git a/README.md b/README.md
@@ -29,6 +29,12 @@ Finding Help: `apropos directory` / `apropos search` (...)
 
 Define custom startup screen: `sudo nano /etc/motd`
 
+Run a script as background process: `python script.py &`
+
+List all running process's: `ps aux`
+
+Kill a running process: `sudo kill 12345`
+
 
 System
 -----------

diff --git a/README.md b/README.md
@@ -35,6 +35,10 @@ System
 
 Get the current path: `pwd`
 
+Copy to clipboard: `pwd | pbcopy`
+
+Paste: `pbpaste`
+
 Get the current hostname: `hostname`
 
 Get the current users: `users`

diff --git a/README.md b/README.md
@@ -198,4 +198,10 @@ Show site IP: `dig +short google.com`
 Tools
 -----------
 
-[Tree](http://mama.indstate.edu/users/ice/tree/tree.1.html): `brew install tree`
+[Tree](http://mama.indstate.edu/users/ice/tree/tree.1.html): `brew install tree`
+
+
+Security
+-----------
+
+Fix OpenSSH Client Bug: https://www.digitalocean.com/community/questions/openssh-client-bug-cve-2016-0777-and-cve-2016-0778
diff --git a/README.md b/README.md
@@ -63,6 +63,17 @@ Change owner: `chown root index.php` (`root` is the username)
 Change group: `chgrp www-data index.php` (`www-data` is the groupname)
 
 
+WordPress Files/Folder Permissions
+-----------
+
+Let apache be owner: `chown www-data:www-data -R *`
+
+Change directory permissions rwxr-xr-x: `find . -type d -exec chmod 755 {} \;`
+
+Change file permissions rw-r--r--: `find . -type f -exec chmod 644 {} \;`
+
+(see http://stackoverflow.com/a/18352747/1815847)
+
 
 Directories
 -----------

diff --git a/README.md b/README.md
@@ -108,6 +108,8 @@ Copy/Page folder with content: `cp -a folder/ new_folder`
 
 Move/Rename file: `mv current-filename.txt new-filename.txt`
 
+Move/Rename file and prompt before overwriting an existing file: `mv -i current-filename.txt new-filename.txt`
+
 Remove file: `rm sample-filename.txt`
 
 View file: `less sample-filename.txt` / `more sample-filename.txt`

diff --git a/README.md b/README.md
@@ -175,6 +175,13 @@ Functions
 Calculate (returns only `int`): `echo $((123/2))`
 
 
+Web
+-----------
+Check site feedback: `ping google.com`
+
+Show site IP: `dig +short google.com`
+
+
 Tools
 -----------