nobitagit/chmod.sh

## chmod.sh
A basic `chmod` recap:

stuff like `chmod a+x fileName` ecc http://www.thegeekstuff.com/2010/06/chmod-command-examples

## recap-shell.sh
# to delete the whole line type
# CTRL + U

# to reverse search a past command (fuzzy searches in the history of all tabs)
# CTRL + r

#similar to ls, gives some info about each file/dir in the current dir
file *

# mark this file as executable (x) by all (a)
chmod a+x start_me.sh
# other opts are user|group|others
chomd [u|g|o]
# write read execute
chmod a+[w|r|x]
# save current directory path into a temporary bookmark
# see: http://cli.learncodethehardway.org/book/ex8.html
pushd ./
# do stuff like cd into whatever dir you need..
# [..after that...]
popd
# you'll be taken back to that dir you saved before

#show calendar of this month
cal
#show calendar of feb 2015
cal 2 2015

#count lines/words/letters in a file
wc file.txt
# outputs
#        3       6      24 txt.txt
# as 3 lines / 6 words / 24 letters
#
# wc flags are :
#    -l - count lines
#    -w - count words
#    -c - count chars

# run last command
!!
# run last command as root
sudo !!
# run last command starting with a specific word
!<word>
# run command but don't save it in the history
<space>command
# create a dir and cd into it
# (The $_  command variable contains the most recent parameter. So if a user were to type the following at the command line: echo foo bar && echo $_ baz, then the output would be as follows:
# foo bar
# bar baz
mkdir myDir && cd $_

# list files that match these requirements
ls | grep "^a" # files beginning with a
find . -name "a*" # files beginning with a (looks in subdirectories as well)

# Suppress success being passed to stdout
# http://stackoverflow.com/questions/18062778/how-to-hide-command-output-in-bash
somecmd somefile.js > /dev/null # only success is suppressed. Error is still logged

# make dir newProject with this file structure:
# hn -|
#     |- build -|
#     |         |- js
#     |- css
#     |- html
#     |- img
#     |- js
#
mkdir -p newProject/{build/js,css,html,img,js}

# create a file together with its parent dirs
mkdir onedir/newdir/newdir2/newdir3 && touch $_/filename.txt

# redirect to file (OVERWRITES the content in non-empty)
cat somefile > new_file.txt

# redirect to file (APPENDS the content in non-empty)
cat somefile >> new_file.txt

# on OSX hold CMD and click on link to open it in the browser
Listening at http://localhost:7770

# curl include headers
curl -i www.google.com
###### =>
HTTP/1.1 302 Found
Cache-Control: private
Content-Type: text/html; charset=UTF-8
Location: http://www.google.co.uk/?gfe_rd=cr&ei=q1iYV7z6C-XR8gfDz4GgBw
Content-Length: 261
Date: Wed, 27 Jul 2016 06:46:03 GMT

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="http://www.google.co.uk/?gfe_rd=cr&amp;ei=q1iYV7z6C-XR8gfDz4GgBw">here</A>.
</BODY></HTML>
########


# see disk used for a certain directory
[sudo] du -chs * [| tail] # where -h is human readable

# list all running jobs along with ID
jobs -l
# kill a certain job by id
kill -9 {job_id}
	A basic `chmod` recap:

	stuff like `chmod a+x fileName` ecc http://www.thegeekstuff.com/2010/06/chmod-command-examples
	# to delete the whole line type
	# CTRL + U

	# to reverse search a past command (fuzzy searches in the history of all tabs)
	# CTRL + r

	#similar to ls, gives some info about each file/dir in the current dir
	file *

	# mark this file as executable (x) by all (a)
	chmod a+x start_me.sh
	# other opts are user\|group\|others
	chomd [u\|g\|o]
	# write read execute
	chmod a+[w\|r\|x]
	# save current directory path into a temporary bookmark
	# see: http://cli.learncodethehardway.org/book/ex8.html
	pushd ./
	# do stuff like cd into whatever dir you need..
	# [..after that...]
	popd
	# you'll be taken back to that dir you saved before

	#show calendar of this month
	cal
	#show calendar of feb 2015
	cal 2 2015

	#count lines/words/letters in a file
	wc file.txt
	# outputs
	# 3 6 24 txt.txt
	# as 3 lines / 6 words / 24 letters
	#
	# wc flags are :
	# -l - count lines
	# -w - count words
	# -c - count chars

	# run last command
	!!
	# run last command as root
	sudo !!
	# run last command starting with a specific word
	!<word>
	# run command but don't save it in the history
	<space>command
	# create a dir and cd into it
	# (The $_ command variable contains the most recent parameter. So if a user were to type the following at the command line: echo foo bar && echo $_ baz, then the output would be as follows:
	# foo bar
	# bar baz
	mkdir myDir && cd $_

	# list files that match these requirements
	ls \| grep "^a" # files beginning with a
	find . -name "a*" # files beginning with a (looks in subdirectories as well)

	# Suppress success being passed to stdout
	# http://stackoverflow.com/questions/18062778/how-to-hide-command-output-in-bash
	somecmd somefile.js > /dev/null # only success is suppressed. Error is still logged

	# make dir newProject with this file structure:
	# hn -\|
	# \|- build -\|
	# \| \|- js
	# \|- css
	# \|- html
	# \|- img
	# \|- js
	#
	mkdir -p newProject/{build/js,css,html,img,js}

	# create a file together with its parent dirs
	mkdir onedir/newdir/newdir2/newdir3 && touch $_/filename.txt

	# redirect to file (OVERWRITES the content in non-empty)
	cat somefile > new_file.txt

	# redirect to file (APPENDS the content in non-empty)
	cat somefile >> new_file.txt

	# on OSX hold CMD and click on link to open it in the browser
	Listening at http://localhost:7770

	# curl include headers
	curl -i www.google.com
	###### =>
	HTTP/1.1 302 Found
	Cache-Control: private
	Content-Type: text/html; charset=UTF-8
	Location: http://www.google.co.uk/?gfe_rd=cr&ei=q1iYV7z6C-XR8gfDz4GgBw
	Content-Length: 261
	Date: Wed, 27 Jul 2016 06:46:03 GMT

	<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
	<TITLE>302 Moved</TITLE></HEAD><BODY>
	<H1>302 Moved</H1>
	The document has moved
	<A HREF="http://www.google.co.uk/?gfe_rd=cr&ei=q1iYV7z6C-XR8gfDz4GgBw">here</A>.
	</BODY></HTML>
	########


	# see disk used for a certain directory
	[sudo] du -chs * [\| tail] # where -h is human readable

	# list all running jobs along with ID
	jobs -l
	# kill a certain job by id
	kill -9 {job_id}