williscool/useful_commands.md

## useful_commands.md

      
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              useful_commands.md
            
          
    Useful commands:
TODO: rearrange this to bottom = oldest and top = newst (2-27-2020) below dashed line
fix tmux resurrect

ln -f -s $(/bin/ls -t tmux_resurrect_*.txt | head -n 1) last
tmux useful comands

https://tmuxcheatsheet.com/

for when your git author info is wrong

https://help.github.com/articles/changing-author-info/
actually useful version of find

find .  -type f -name '*yml*' -not -path "*node_modules*" -not -path "*bower*" | grep aws
using sed

http://stackoverflow.com/questions/1583219/awk-sed-how-to-do-a-recursive-find-replace-of-a-string
http://superuser.com/questions/428493/how-can-i-do-a-recursive-find-and-replace-from-the-command-line
http://askubuntu.com/questions/266179/how-to-exclude-ignore-hidden-files-and-directories-in-a-wildcard-embedded-find
find . -not -path '*/\.*' -type f -print0 | xargs -0 sed -i 's/thing/another_thing/g'
even better
ag thingy-to-replace -l0 | xargs -0 sed -i '' 's/thingy-to-replace/replacement/g'
also very useful
git diff --name-only HEAD~1 | grep <filename-filter> | xargs sed -i -e 's/thingy-to-replace/replacement/g'
kill a hung ssh session

<Return>~.
http://superuser.com/questions/467398/how-do-i-exit-an-ssh-connection/620787#620787
pass vim a command at startup

vim -c ":NERDTree"
use mouse in vim

google vim mouse support. also http://superuser.com/questions/549930/cant-resize-vim-splits-inside-tmux
http://stackoverflow.com/questions/3249275/vim-multiple-commands-on-same-line
set mouse=a | set ttymouse=xterm2
Actually useful silver searcher for node.js projects

ag --ignore '*node_mod*' --ignore '*bower*' "thing you actually want"
unfreeze terminal when you froze it by pressing Ctrl + s

Ctrl + q
make terminal stop freezing like a dumb ass

stty -ixon
http://unix.stackexchange.com/questions/12107/how-to-unfreeze-after-accidentally-pressing-ctrl-s-in-a-terminal
Make a small tmux window big

Ctrl + Z
press it again to make it small again
For when aptget stupidly forces ipv6

sudo aptitude -o Acquire::ForceIPv4=true update

the -o Acquire::ForceIPv4=true works with all of the other commands too
manage multple ssh keys. and not have to put your password in all the time

eval `ssh-agent -s`
ssh-add -D
ssh-add ~/.ssh/your_account_key

http://stackoverflow.com/questions/13752908/managing-multiple-ssh-keys-on-heroku
http://stackoverflow.com/questions/17846529/could-not-open-a-connection-to-your-authentication-agent
flush chrome dns caches

chrome://net-internals/#dns

delete all space until the next character

Ctrl + Delete
pgrep is your friend when killall is being dumb

kill $(pgrep unity-panel-ser)
upgrade postgres with pg_upgrade

sudo -H -u postgres /usr/lib/postgresql/9.3/bin/pg_upgrade \
  -b /usr/lib/postgresql/9.2/bin \
   -B /usr/lib/postgresql/9.3/bin \
   -d /etc/postgresql/9.2/main/ \
   -D /etc/postgresql/9.3/main/ \
   -p 5432 \
   -P 5433
   
#### then dont forget to go into the new install's postgres.conf and change the port from 5433 to 5432
### also setup trust auth for local dev connections

sshfs

### this part unmounts the dir for you if it was unproperly done last time. like say by a disconnect
sudo umount -l /path/you/want/stuff/at

sshfs you@example.com:/remote/path/stuff/is/from /path/you/want/stuff/at

print out the postgres commands to change all the table ownerships

SELECT 'ALTER TABLE ' || table_name || ' OWNER TO <new user name>;' 
  FROM information_schema.tables
 WHERE table_schema='public'
   AND table_type='BASE TABLE';
rsync ftw

http://www.thegeekstuff.com/2010/09/rsync-command-examples/
rsync -avz /root/temp/ thegeekstuff@192.168.200.10:/home/thegeekstuff/temp/
open vim at certain line num

vi +124 app/assets/javascripts/application.js.erb
hash except idiosyncrasies

hash.except(*default_hash.keys) != hash.except(default_hash.keys)
Arel predicates (sql operator functions)

http://rubydoc.info/github/rails/arel/master/Arel/Predications
ctags

regenerate rails ctags

ctags -R app/ test/ vendor/ lib/
or
ctags -R --exclude=vendor --exclude=public --exclude=db .
ctags and ruby

http://blog.bojica.com/2010/06/27/ctags-and-vim-for-ruby-on-rails-development
year ago postgres

select now() - interval '1 year';
copy file name to vim paste buffer

http://stackoverflow.com/questions/916875/yank-file-name-path-of-current-buffer-in-vim
let @" = expand("%:p")
also copy relative name to system clipboard

let @+ = expand("%")
for that awkward moment after you hard reset because you commited a bunch of stuff you didnt want to

git clean -d app/ db/ test/ config/ share/ vendor/ lib/ public/ script/
log out all patches to a file

git log -p
scp

scp ~/path/to/file william@example.com:~/path/on/remote/server

##find sucks
use locate, also you can pipe it to grep with the current dir for only that
its a seperate db that trails behind the real filesystem but its a shitton faster than find and easier to use
locate file_name_.ext | grep `pwd` | less
locate builder | grep $(pwd) 

update ur submodules

git submodule init && git submodule foreach git pull origin master


make less colorize right less -R
Re: http://shuttlethread.com/blog/useful-ack-defaults


http://stackoverflow.com/questions/2928584/how-to-grep-search-the-git-history/2928721#2928721
git log --since=2011.1.1 -S "some string" --  app/helpers/


port fowarding for torquebox ports

sudo ipfw add fwd 127.0.0.1,8080 tcp from any to me dst-port 80 in
sudo ipfw add fwd 127.0.0.1,8443 tcp from any to me dst-port 443 in
#tmuxinator session
rvm use ruby-1.9.3-p0 && mux project_name
#clear the screen with out typing "clear"
^L (ctrl + l)
#find a gem location
gem which gem_name
#list ur postgres databases
\list
#postgre server log if you install with brew on osx
less /usr/local/var/postgres/server.log
#add params / parameters to a rails url
url_for(params.merge({:param_name => model.name})
#get a list of vim key mapings
:verbose map
#open file in nerdtree with only the context of its parent directory
NERDTree %
#find a program path directory location whatnot
which ruby
#screw up javascript
Array.prototype.push = '(╯°□°）╯︵ ┻━┻';
#git stash only unstaged
git stash -k
#git checkout file from branch
git co <branch_name> -- <path_to_file>
#catch window.alert errors
var oldAlert = window.alert; // reference to the original window.alert
window.alert = function(message) {
if (window.console && console.log) {
debugger;
console.log(message);
} else {
oldAlert(message); // if console.log doesn't exist call window alert
}
}
#have git log trace the history of some string in a file
git log -S "hi ima string maybe a function_name"  app/controllers/some_controller.rb
#history of one file
gitx -- path/to/file
#git merge one specific branch with a certain strategy
git pull --strategy=ours origin feature/marketer_alerts_ticket_31305
not very useful but fun to run on a git code base

git log | grep Author | sort | uniq | less
searching the mac mail old school

Peached Tortilla OR Empanda OR food OR tacos OR truck
WUT!!! a date time from a string with a date in it!

"May 17 2011".to_datetime
ruby idiosyncrasies

focus == :foo || focus == :bar
AND
focus == :foo ||:bar
ARE DIFFERENT THINGS !!!!!!!!!!!!!!!
making good rails error message stack traces

logger.error "Error:  could not do a thing I wanted to do"
logger.error $!.message
logger.error $!.backtrace.join("\n")
check an object's errors

object.errors
reset you head to the branches upstream

git reset origin/name_of_branch
see what changes are on your branch that aren't on the upstream

git log origin/branch..HEAD
git log origin/branch..
#pry for the win https://github.com/pry/pry/wiki/Setting-up-Rails-or-Heroku-to-use-Pry
binding.pry #this goes in your codes
pry -r config/environment
#tell git to ignore changes in tracked files
http://pivotallabs.com/users/rolson/blog/articles/1278-ignoring-tracked-files-in-git
git update-index --assume-unchanged config/database.yml
git update-index --assume-unchanged Gemfile Gemfile.lock

and to make them survive a hard reset
=  git update-index --skip-worktree path/to/file
= http://fallengamer.livejournal.com/93321.html

how to do a migration

./script/generate migration add_to_or_change_database_somehow
class TheMigrationNameAndWhatItDoes < ActiveRecord::Migration
def self.up
add_column :table_name, :column_name, :type
end
def self.down
remove_column :table_name, :column_name
end
end
#git checkout a new branch based off of the current branch
git co -b branch_name
#DELETE an address / from the CHROME search BAR suggestion
shift + delete
remove file from git stage

git reset HEAD 
how to use a difftool that doesn't suck on a mac

http://gitguru.com/2009/02/22/integrating-git-with-a-visual-merge-tool/
#tab between windows of one application
superkey + ~
OR bring process back to foreground with:
fg
kill rails console when it gets into that weird state

crtl - Z
ps aux | grep ruby
killall ruby
symlink http://www.mydigitallife.info/how-to-make-or-create-symbolic-link-in-unix-or-linux/

http://stackoverflow.com/questions/8071168/create-symbolic-directory

!WARNING
always use ls -all to/dir

always use a full path for both source and destination
in the destination directory to make sure the link was created correctly

ln -s from/dir to/dir
!Important note. if you want it to be directory make sure TO use the slash in from of the source directory
also to double check its correctness
tell rvm to use a certain gemset

rvm use 1.9.2-p290@gemset_name
reverse a merge

http://lostechies.com/derickbailey/2010/04/01/git-how-to-revert-a-branch-merge/
git reset --hard HEAD^
thin with bundle exec

bundle exec thin -e development start
quit both sides of git difftool

:qa
reenable right click

document.oncontextmenu = null;
if (typeof document.body.style.MozUserSelect!="none"){
document.body.style.MozUserSelect=null;
}
document.body.onmousedown = null;document.body.onselectstart = null;
inject le jquery

var element1 = document.createElement("script");element1.src = "http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js";element1.type="text/javascript";document.getElementsByTagName("head")[0].appendChild(element1);
start console with test environment

rails c test
#Git track a remote branch for an existing branch
git branch --set-upstream branch_name origin/branch_name
#Git track a remote branch
git branch --track feature/branch_name origin/feature/branch_name
Screen Shot on mac

http://guides.macrumors.com/Taking_Screenshots_in_Mac_OS_X

Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop
Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard

#why you have missing attribute errors
http://www.cowboycoded.com/tag/missingattributeerror/

basically because you used :select

#update test database
migrate dev db && then copy schema to test db

bundle exec rake db:migrate && bundle exec rake db:test:prepare
#run tests
ruby -I"test" test/functional/controller_name_test.rb --name /account/
#restart windows in safe mode
start -> "msconfig" -> boot options
#kill part of the rails cache
Rails.cache.clear
Rails.cache.delete "key/value/name"
running tests

ruby -I test {path/to/test}
how to to resize a linux vmware disk partition

http://creechy.wordpress.com/2011/03/16/resizing-an-lvm-in-a-centos-vmware-guest/
mac share dir on vm

/mnt/hgfs
How to fucking use a centos vmware image

http://lists.centos.org/pipermail/centos-virt/2008-February/000203.html
how to reset a local branch to a remote forcibly

git fetch --all
git reset --hard origin/<remote-branch-name>

Manual migrate

require ".db/migrate/#{timestamp}_migration_name.rb"
WhateverClassName.down
WhateverClassName.up

#pull updates for git submodules
git submodule foreach git pull
#Make git not do the thing noted here http://kartzontech.blogspot.com/2011/04/how-to-disable-gnome-ssh-askpass.html
unset SSH_ASKPASS
#Make Git shutup completely about ssl certs
export GIT_SSL_NO_VERIFY=true
#Make git ignore ssl certs only once
env GIT_SSL_NO_VERIFY=true  git pull ...


tell grep to skip/ignore directory for one command
env GREP_OPTIONS="--exclude=*log*" grep -Iirn "pgi=" * | less


tell grep to ignore svn directories
export GREP_OPTIONS="--exclude=*.svn*"


#switch user super
sudo su - postgres
vim line numbers
:set number


how to search for a file named something in the codebase
find . -name 'event.' -type f | less


how to search for an instance of something in text of a file in the codebase
(-r means recursive,
-i is case insensitive, and
-l means say the filename instead of printing out the files contents to the standard out)


n = include line number


I = ignore binary files


grep -Iirn "pgi=" * | less


the osx version cuz you know apple always gotta be differnt :/
#http://www.napolitopia.com/2010/03/lscolors-in-osx-snow-leopard-for-dummies/
export LSCOLORS='Bxgxfxfxcxdxdxhbadbxbx'


how to highlight directories as a different color from the ls command if that isnt already happening
export LS_COLORS='di=01;36'


also^ http://lifehacker.com/219058/geek-to-live--visualize-your-hard-drive-usage
du -k | sort -nr
current directory size
du -sh (add * for sub dirs)
filesystem size
df -h


Reload ruby console in ruby console
reload!


Stop a process then restart when you get ready to use it again in same state


Ctrl + z
fg
Exclude file from git diff or log

git diff . ":^yarn.lock"
fix chrome window switch on mac

install hyperswitch
use Option + Tab