A random assortment of notes on linux including commands. This is a work in progress

chmod

Owner	Group	Other
r w x	r w x	r w x
------------	------------	------------
1 1 1	1 1 1	1 1 1

• 4 is for read
• 2 is for write
• 1 is for execute
• 0 is for no permission

Changes file permissions to a mode and a mode describes the permissions to modify. Doesn't change the permissions of symbolic links. Eg chmod 740 allows read, write, execute for owner, read for group and no permission for other.

Vim

Vim is a popular command based text editor. Vim is keyboard orientated which renders your mouse useless. It can make you a more effecient developer especially as a project gets larger and most coding requires hopping about a code base making changes. There are a number of keyboard shortcuts which I'll list below:

• :q quit
• :w save (this can be used in conjunction with q)
• i this is insert mode which allows you to edit starting before the current character Note to leave this ensure you esc
• a this allows you to edit characters starting after the current character
• h, j, k, l - these are used to move left, right, up, down
• w to move forward one word
• b to move back 1 word
• gg to move to very start of file
• $ to move to end of line
• 0 to move to start of line
• dw to delete a word and dd to delete an entire line
• / to begin searching for a word
• For copying and pasting, you can use a combination of v to highlight words and y to yank them followed by p to paste it
• u to undo the last thing

Those are just some basic commands I find quite useful however you can hone your vim skills here: https://vim-adventures.com/ or use this anki deck: https://ankiweb.net/shared/info/553269875.