error log trying to install express - npm

Question

work with debian testing repositories pointing to testing. I installed node, and express npm following some tutorials and I made some mistakes by not paying attention.
1.- First I did the following as root:
https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manag ...
# echo sid main deb http://ftp.us.debian.org/debian/> /etc/apt/sources.list.d/sid.list
# apt-get update
# apt-get install nodejs # Documentation is great.
# node-v v0.4.12
2.- You should then have done the following http://www.freshblurbs.com/install-node-js-and-express-js-nginx-debian-lenny:
$ cd
$ curl http://npmjs.org/install.sh | sh
$ which npm
but rather as a user I did not realize and what I did as root and it did not change the directory, ie do the following:
# Curl http://npmjs.org/install.sh | sh
# Which npm
/usr/bin/npm
and if I go to that directory permissions are for root, but not whether they should be user.
/usr/bin $ ls-la npm
lrwxrwxrwx 1 root root 38 Jan 7 20:09 npm -> .. /lib/node_modules/npm/bin/npm-cli.js
3.- In making the last step:
$ npm express install
$ express /tmp/foo&&cd/tmp/foo
or this to install for global
$ npm install-g express
$ express /tmp/foo&&cd/tmp/foo
and did the first, but when attempting the second with
$ npm install-g express
I get these errors
$ npm install-g express
npm ERR! Could not create / usr / lib / node_modules / ___express.npm
npm ERR! Error installing express#2.5.4 Error: EACCES, Permission denied '/ usr / lib / node_modules / ___express.npm'
npm ERR! Error: EACCES, Permission denied '/ usr / lib / node_modules / ___express.npm'
npm ERR! Report this * Entire * log at:
npm ERR! <http://github.com/isaacs/npm/issues>
npm ERR! or email it to:
npm ERR! <npm-#googlegroups.com>
npm ERR!
npm ERR! System Linux 3.0.0-1-amd64
npm ERR! command "node" "/usr/bin/npm" "install" "-g" "express"
npm ERR! cwd /home/luis
npm ERR! node-v v0.4.12
npm ERR! npm-v 1.0.106
npm ERR! path/usr/lib/node_modules/___express.npm
npm ERR! EACCES code
npm ERR!
npm ERR! Additional logging Can be found in details:
npm ERR! /home/luis/npm-debug.log
npm not ok
Total I have a major mess, as there are in that situation I am.
I tested with this as helloworld.js node
var sys = require ('sys');
sys.puts ('Hello World');
and making a
$ Node helloworld.js
Hello World
It works, but I want to install Express to develop.
Is it a problem to install it as root?
Can you help me?

Answer 1

I met the same problem like yours.
My solution is:
$ sudo npm install-g express
instead of：
$ npm install-g express
Enter my password. It shows:
Usage: npm
where is one of:
adduser, apihelp, author, bin, bugs, c, cache, completion,
config, deprecate, docs, edit, explore, faq, find, get,
help, help-search, home, i, info, init, install, la, link,
list, ll, ln, login, ls, outdated, owner, pack, prefix,
prune, publish, r, rb, rebuild, remove, restart, rm, root,
run-script, s, se, search, set, show, star, start, stop,
submodule, tag, test, un, uninstall, unlink, unpublish,
unstar, up, update, version, view, whoami
npm -h quick help on
npm -l display full usage info
npm faq commonly asked questions
npm help search for help on
npm help npm involved overview
Specify configs in the ini-formatted file:
/Users/(your personal account name)/.npmrc
or on the command line via: npm --key value
Config info can be viewed via: npm help config
npm#1.1.1 /usr/local/lib/node_modules/npm
It works. Hope my solution can help you;-)

Answer 2

You may try sudo npm express install, and then enter your password of your system account

Answer 3

when you install with:
npm install somemodule -g
it installs the somemodule in /usr/local/lib/node_modules (-g: globally/system-wide) To successfully install a module globally, you'll need write access to the destination directory. Hence the need for sudo npm ...
if instead you do:
npm install somemodule
2 choices there:
somemodule gets installed in ~/.npm for the current user only (at least on Ubuntu)
if a package.json file exists in the current directory, somemodule gets installed in the ./node_modules directory.
Note(1): npm temporarily uses ~/tmp during the installation. if this directory doesn't already exist, it gets created. if using sudo npm, it will do so with 'root' ownership, which will later yield an install error unless npm is again run with sudo. Fix: chowm -R whoami ~/tmp
Note(2): to use global modules, make sure that you have NODE_PATH defined in your environment.

Answer 4

i had the same problem of installing express due to version compatibility, based on the following link : http://expressjs.com/migrating-4.html
i run the following commands :
1- npm uninstall -g express
2 npm install -g express-generator
3- express --version
the last command retunrs 4.9.0 as version