Section 1
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sudo
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Last updated
6 years ago
Date created
Mar 1, 2020
Cards (51)
Section 1
(50 cards)
sudo
the ability to become a superuser for a single command line operation
show databases; (when logged in)
show databases
xargs
execute arguments
exit
exit the shell
cp - cp iamcool.txt neat.txt - cp awesome.txt otherdir/ - cp -r dirname newdirname
copy a file / directory from one location to another - within the same dir - to a different dir (/ makes sure it is really a directory: if the directory doesn't exist I'll get an error - copy a dir to a newly created dir with files in it
open .
open current directory in Finder
select * from [tablename]
show records
apropos
find what man page is appropriate
mysql
check msql version on built-in server
mysql -uroot -ppassword [password?];
log in mysql as root user, seting/using a password
ls - ls -a - ls -l - ls -R - ls -l -R - OR RATHER: ls -lR - ls -las
list directory - list invisible files - list directory + details - recursively lists subdirectories - combining some of the above - longlist all: invisible files too, showing sizes in blocks
mv - mv filename newfilename - mv olddir newdir - mv filename destdir - mv -i filename newfilename - mv -n filename newfilename
move a file or directory from one location to another - renaming a file - rename a dir and keep content - move a file to a new location - force mv prompts before overwriting an existing file - make mv not overwrite an existing file
pushd
push directory: to save your current location and go to a new location - pushd (with no arguments): to switch between your current dir and the last one you pushed
cd downloads > ls
go to downloads folder and list contents
ln
see: https://www.computerhope.com/unix/uln.htm
drop table [tablename];
drop table
cat filename - cat filename anotherfile
print the whole file - prints both files
export
export/set a new environment variable
chown
changes ownership of files and directories
touch newfile.txt (Unix) New-Item newfile.txt (Windows)
to make an empty file
man
read a manual page
find
find files
unzip -a [filename]
to unzip a file
create table [tablename] (id integer PRIMARY KEY AUTO_INCREMENT, columnname datatype NOT NULL, columnname datatype NOT NULL);
create table
create database [dbname]; (when logged in)
create a database
show tables;
show tables of chosen db
describe [tablename];
see table
open ~/Desktop/merge.txt open -a "Sublime Text" ~/Desktop/merge.txt
- open a file - open a file in a specified application
less
page through a file: view (but not change) the contents of a text file on screen - use the arrow key to page up/down
vagrant ssh Ctrl + D
SSH into Vagrant SSH out of Vagrant
mysql -uroot;
log in mysql as root user
cd / cd Volumes cd ls -la
list all hard drives
type -a [progname]
find various versions of a prog in your PATH
hostname
my computer's network name
use [dbname]; (when logged in)
choose the db you want to work with
SOURCING: - source filename [arguments] - . filename [arguments]
- used to load any functions file into the current shell script or a command prompt / executes the content of the file passed as argument, in the current shell
cd - cd ~ OR: cd (without directory name) - cd / - cd .. - cd - - cd . - cd temp/stuff/things/orange/apple/pear/grape/
change directory - back home - go to root level of your startup disk - go to the directory above the one you're currently in - go back to the directory you were in before the last time you issued the cd command - current directory - using a path
mkdir directoryname mkdir -p temp/stuff/things/etc mkdir "directory name"
make directory - with a path - with a space in the name
popd
pop directory: to return to the saved (using pushd) location
insert into [tablename] (colname, colname) values('string or whatever', false);
insert a new record/row
echo
print some arguments
chmod
change the permissions of files or directories
ctrl+D
exit out of MySQL
brew search mysql
check mysql with Homebrew
pwd
print working directory
vim [filename] see more: https://github.com/yuanqing/vim-basics/blob/master/README.md
open file in Vim
man hier
get an overview of aliased directories inside /private, eg. /etc; /var
grep
find things inside files
go to dir above the one you want to remove, then: - rmdir dirname - rm -rf dirname - rm filename
- remove directory - when OSX refuses to remove dir saying it's not empty (there's a hidden .DS_Store file in it) - remove file
env
look at your environment
Section 2
(1 card)