Merge branch 'LeCoupa:master' into master

databases/mysql.sh

@@ -10,3 +10,5 @@ SHOW PROCESSLIST; # Show you any queries that are currently running or in the qu
 GRANT ALL PRIVILEGES ON prospectwith.* TO 'power'@'localhost' WITH GRANT OPTION; # Grant all privileges on database
 
 CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password'; # Create user
+
+mysql -u root -pmypassword -e "MY SQL QUERY" &>> query.log & disown # Run SQL query in the background

languages/bash.sh

@@ -117,6 +117,9 @@ grep -r <pattern> <dir>       # search recursively for pattern in directory
 head -n file_name | tail +n   # Print nth line from file.
 head -y lines.txt | tail +x   # want to display all the lines from x to y. This includes the xth and yth lines.
 
+sed 's/<pattern>/<replacement>/g' <filename> # replace pattern in file with replacement value to std output the character after s (/) is the delimeter 
+sed -i 's/<pattern>/<replacement>/g' <filename> # replace pattern in file with replacement value in place
+echo "this" | sed 's/is/at/g' # replace pattern from input stream with replacement value
 
 ##############################################################################
 # DIRECTORY COMMANDS
@@ -145,6 +148,9 @@ ssh -p <port> user@host  # connects to host on specified port as user
 ssh-copy-id user@host    # adds your ssh key to host for user to enable a keyed or passwordless login
 
 whoami                   # returns your username
+su <user>                # switch to a different user
+su -                     # switch to root, likely needs to be sudo su -
+sudo <command>           # execute command as the root user
 passwd                   # lets you change your password
 quota -v                 # shows what your disk quota is
 date                     # shows the current date and time
@@ -154,6 +160,8 @@ w                        # displays whois online
 finger <user>            # displays information about user
 uname -a                 # shows kernel information
 man <command>            # shows the manual for specified command
+info <command>           # shows another documentation system for the specific command
+help                     # shows documentation about built-in commands and functions
 df                       # shows disk usage
 du <filename>            # shows the disk usage of the files and directories in filename (du -s give only a total)
 last <yourUsername>      # lists your last logins
@@ -381,7 +389,7 @@ n<&m       # file descriptor n is made to be a copy of the input file descriptor
 <&-        # closes the standard input
 >&-        # closes the standard output
 n>&-       # closes the ouput from file descriptor n
-n<&-       # closes the input from file descripor n
+n<&-       # closes the input from file descriptor n
 
 |tee <file># output command to both terminal and a file (-a to append to file)
 

languages/java.md

@@ -196,6 +196,24 @@ int c = a + b;
      System.out.println(i);
   }
 ```
+
+>Enhanced for loop/for-each 
+```java
+for(dataType item : array) {
+    ...
+}
+
+```
+**Example:**
+```java
+    // array of numbers
+    int[] numbers = {100, 200, 300, 400};
+    
+    // for each loop 
+    for (int number: numbers) {
+      System.out.println(number);
+```
+
 > WHILE LOOP STATEMENT
 ```java
     while(condition){  //till condition will be true.

tools/git.sh

@@ -41,6 +41,7 @@ git grep --heading --line-number '<string/regex>' # Find lines matching the patt
 git log --grep='<string/regex>'                   # Search Commit log
 
 git commit -m "msg"          # commit changes with a msg
+git commit -m "title" -m "description" # commit changes with a title and description
 git commit --amend           # combine staged changes with the previous commit, or edit the previous commit message without changing its snapshot
 git commit --amend --no-edit # amends a commit without changing its commit message
 git commit --amend --author='Author Name <email@address.com>'    # Amend the author of a commit

tools/vim.txt

@@ -29,6 +29,7 @@ $                   end of line
 <enter>             move line downwards, on the first non blank character
 gg                  go to first line
 G                   go to last line
+ngg                 go to line n
 nG                  go To line n
 :n                  go To line n
 )                   move the cursor forward to the next sentence.