We use usermod command to modify an user account in linux. Let’s execute below command to add our existing user aniruddha to the group shared.
$ sudo usermod -a -G shared aniruddha
Set appropriate permission on the directory
By default linux assign the group of a newly created directory or file to it’s current user. But we have to set the group of the directory to shared so that all user in the shared group can access the directory. And we also have to set the setGID so that newly created files or directory inside the shared_directory have the same group as the parent directory.
Here chgrp is used to change the group of any directory or file and chmod is used to change the permission. Here -R is recursive operation. 2 is for the setGID. 7 is the rwx permission. 5 is the rx permission.
Create more system users
Now it’s time to create more system user and assign them to the group shared.
Most of us use git as their version control system and in day to day life while developing any application we commit our changes quite frequently. We follow the traditional way of committing changes like below –
$ git commit -m "Our commit message"
But we have another cool option to do this commit. We can use our favorite text editor for this commit. We have to first tell git that pop up the text editor every time you commit changes. For this execute below command in your terminal –
$ git config --global core.editor "vim"
Here it will pop up the vim text editor when you will execute git commit.
So, almost 2 years ago I heard about C programming language from my close friend and I thought I should give it a try and I asked “how can I start with it?” and he gave me some notes and said just install turboC++ and start writing code. So, I installed it and started with C language and eventually I got demotivated and quit programming after some time. Actually it was not fun and engaging with that environment. After one year in my college their was a seminar of network security and the guest speaker said that everyone should try python once and it is really amazing language. And I went home and searched for the python in the YouTube and found lots of tutorial on it and picked up one and that tutorial is using VSCode after that I loved that text editor and still I use it in my daily work.
In my recent days I got to know about a new text editor called vim and I recently installed and start using it. The most funny thing is when I first open a file with it I was not able to exit from it :p. Now I use it in most of the time while writing code. When you will first install it then it will look something below like this
The vim allow us to customize it however we want and we customize it by writing some code in the ~/.vimrc and if the file is not there you can add it by doing touch ~/.vimrc command. Now add below line to your file first.
Now we will add some plugins in this file and then we are going to install it.There are couple of ways to install plugins and the way i like is by Vundle And the section below shows how to add plugins .
Plugin 'scrooloose/nerdTree' "Documents tree
Plugin 'davidhalter/jedi-vim' "python autocompletion
Plugin 'scrooloose/syntastic' "code syntaxis
Plugin 'Raimondi/delimitMate' "automatic closing of quotes, parenthesis...
Plugin 'yggdroot/indentline' "Show indent lines (useful for loops)
Plugin 'ervandew/supertab' "<Tab> for code completion
autocmd BufWritePre *.py execute ':Black'
let g:black_linelength = 79
let g:PyFlakeOnWrite = 1
let g:PyFlakeCheckers = 'pep8,mccabe,frosted'
let g:PyFlakeDisabledMessages = 'E1101,C0111,E1136,W0703,C0103,C0330,W504'
let g:PyFlakeAggressive = 0
let g:PyFlakeCWindow = 6
let g:PyFlakeSigns = 1
let g:PyFlakeSignStart = 1
let g:PyFlakeForcePyVersion = 3
filetype plugin indent on
" Go syntax highlighting
let g:go_highlight_fields = 1
let g:go_highlight_functions = 1
let g:go_highlight_function_calls = 1
let g:go_highlight_extra_types = 1
let g:go_highlight_operators = 1
" Go preview disable
" Auto formatting and importing
let g:go_fmt_autosave = 1
let g:go_fmt_command = "goimports"
" Status line types/signatures
let g:go_auto_type_info = 1
" Run :GoBuild or :GoTestCompile based on the go file
let l:file = expand('%')
if l:file =~# '^\f\+_test\.go$'
call go#test#Test(0, 1)
elseif l:file =~# '^\f\+\.go$'
" Map keys for most used commands.
" Ex: `\b` for building, `\r` for running and `\b` for running test.
autocmd FileType go nmap <leader>b :<C-u>call <SID>build_go_files()<CR>
autocmd FileType go nmap <leader>r <Plug>(go-run)
autocmd FileType go nmap <leader>t <Plug>(go-test)
au filetype go inoremap <buffer> . .<C-x><C-o>
" NERDTree setup
map <C-z> :NERDTreeToggle<CR> “ Toggle side window with `CTRL+z`.
let g:NERDTreeDirArrowExpandable = '▸'
let g:NERDTreeDirArrowCollapsible = '▾'
let NERDTreeShowHidden=1 " Show hidden files
" Vim airline
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#tabline#left_sep = ' '
let g:airline#extensions#tabline#left_alt_sep = '|'
let g:airline#extensions#tabline#formatter = 'default'
" Git Gutter
" Use fontawesome icons as signs
let g:gitgutter_sign_added = '+'
let g:gitgutter_sign_modified = '>'
let g:gitgutter_sign_removed = '-'
let g:gitgutter_sign_removed_first_line = '^'
let g:gitgutter_sign_modified_removed = '<'
let g:gitgutter_override_sign_column_highlight = 1
highlight SignColumn guibg=bg
highlight SignColumn ctermbg=bg
nmap <Leader>gn <Plug>GitGutterNextHunk " git next
nmap <Leader>gp <Plug>GitGutterPrevHunk " git previous
nmap <Leader>ga <Plug>GitGutterStageHunk " git add (chunk)
nmap <Leader>gu <Plug>GitGutterUndoHunk " git undo (chunk)
" Open vimagit pane
nnoremap <leader>gs :Magit<CR> " git status
" Move between buffers
map gn :bn<cr>
map gp :bp<cr>
map gd :bd<cr>
" Move line up and down
nnoremap K :m .-2<CR>==
nnoremap J :m .+1<CR>==
vnoremap K :m '<-2<CR>gv=gv
vnoremap J :m '>+1<CR>gv=gv
" Set Ctrl+h for highlight search
nnoremap <c-h> :set hlsearch!<cr>
" Disable K for documentation of go and py
let g:go_doc_keywordprg_enabled = 0
let g:jedi#documentation_command = 0
That’s how we add Plugins to the vim by writing Plugin and after that what plugin we want to install. Now to install plugins first type Esc then : and after that type PluginInstall then press enter and all the plugins will install one by one.