Fix Starting httpd: (98)Address already in use

Quick note for myself. Today I have to increase php upload maximum size in Centos server.

I got this error :

# /sbin/service httpd restart
Stopping httpd:                                            [FAILED]
Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address
no listening sockets available, shutting down
Unable to open logs


Everything is fine and nothing change for configuration, the only strange is so many child process of apache.

# fuser 80/tcp
80/tcp:                398  1404  1546  2715  2762  2810  3750  4017  5110  5561  6714  7456  8079  8178  8179  8180  8665  8937  8938  8939  8947  8948  8949  8950  8951  8952  8953  8954  8955  8956  8959  8960  8977  8978  8979  9186 11382 13507 13547 13548 13574 13584 13587 13588 13589 14092 14570 15236 15742 20804 22014 23891 24560 24846 27136 27268 27269 27272 27996 29080 29268 29394 29395 29396 29803 30398 31883 32078 32555

Killall command is very suitable in this case :

# killall httpd

Try again :

# service httpd start
Starting httpd:                                            [  OK  ]

It works now :-)

Step by step guide create apk for your ionic framework project

I just learn to use ionic framework and I like it since I can use my knowledge in html and css a bit. The process also push me to learn about angular js. As the process getting fun each day I got litttle problem with create apk process (part of publishing). Specially in sign step. I try to recreate it by make simple ‘blank’ project.

Here’s my environment :

$ ionic info

Your system information:

Cordova CLI: 5.3.1
Gulp version:  CLI version 3.9.0
Gulp local: 
Ionic CLI Version: 1.6.5
Ionic App Lib Version: 0.3.9
OS: Distributor ID:    Peppermint Description:    Peppermint Five
Node Version: v4.0.0

Create the project

$ ionic start test blank

$ cd test/

$ ionic platform add android

Start process build apk

$ cordova plugin rm cordova-plugin-console

$ cordova build –release android





Total time: 13.138 secs
Built the following apk(s):

Generate Private Key

I use this convention :

keytool -genkey -v -keystore appname.keystore -alias appnamekey -keyalg RSA -keysize 2048 -validity 10000

$ keytool -genkey -v -keystore test.keystore -alias testkey -keyalg RSA -keysize 2048 -validity 10000
Enter keystore password: 
Re-enter new password:
What is your first and last name?
  [Unknown]:  alamsyah rasyid
What is the name of your organizational unit?
  [Unknown]:  digitalfusi
What is the name of your organization?
  [Unknown]:  digitalfusi
What is the name of your City or Locality?
  [Unknown]:  palembang
What is the name of your State or Province?
  [Unknown]:  sumsel
What is the two-letter country code for this unit?
  [Unknown]:  id
Is CN=alamsyah rasyid, OU=digitalfusi, O=digitalfusi, L=palembang, ST=sumsel, C=id correct?
  [no]:  yes

Generating 2,048 bit RSA key pair and self-signed certificate (SHA256withRSA) with a validity of 10,000 days
    for: CN=alamsyah rasyid, OU=digitalfusi, O=digitalfusi, L=palembang, ST=sumsel, C=id
Enter key password for <testkey>
    (RETURN if same as keystore password): 
[Storing test.keystore]

Sign apk file

1st error :

$ jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore test.keystore android-release-unsigned.apk test
Enter Passphrase for keystore:
jarsigner: Certificate chain not found for: test.  test must reference a valid KeyStore key entry containing a private key and corresponding public key certificate chain.

note : I don’t use absolute path for this command.

2nd error :

$ jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore /home/alamsyah/test/test.keystore android-release-unsigned.apk testkey
Enter Passphrase for keystore:
jarsigner: unable to open jar file: android-release-unsigned.apk

note : I type the command not in the same location of .apk file

$ cd platforms/android/build/outputs/apk/

retype the command

$ jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore /home/alamsyah/test/test.keystore android-release-unsigned.apk testkey
Enter Passphrase for keystore:
  signing: AndroidManifest.xml
  signing: assets/www/cordova-js-src/android/nativeapiprovider.js
  signing: assets/www/cordova-js-src/android/promptbasednativeapi.js
  signing: assets/www/cordova-js-src/exec.js
  signing: assets/www/cordova-js-src/platform.js
  signing: assets/www/cordova-js-src/plugin/android/app.js
  signing: assets/www/cordova.js
  signing: assets/www/cordova_plugins.js
  signing: assets/www/css/style.css
  signing: assets/www/img/ionic.png
  signing: assets/www/index.html
  signing: assets/www/js/app.js


signing: classes.dex
jar signed.

No -tsa or -tsacert is provided and this jar is not timestamped. Without a timestamp, users may not be able to validate this jar after the signer certificate’s expiration date (2043-02-17) or after any future revocation date.

Optimize apk with zipalign

zipalign is part of jdk. In my case I already install it in /opt

$ pwd
alamsyah@alamsyah-HP-Pavilion-14-Notebook-PC /opt/android-sdk/build-tools/23.0.1 $ ls
aapt  arm-linux-androideabi-ld  dexdump  i686-linux-android-ld  jill.jar  llvm-rs-cc      mainDexClasses.rules     NOTICE.txt  split-select
aidl  bcc_compat                dx       jack.jar               lib       mainDexClasses  mipsel-linux-android-ld  renderscript   zipalign

So the correct command is :

$ /opt/android-sdk/build-tools/23.0.1/zipalign -v 4 android-release-unsigned.apk  test.apk
Verifying alignment of test.apk (4)…
      50 META-INF/MANIFEST.MF (OK – compressed)
    3297 META-INF/TESTKEY.SF (OK – compressed)
    6633 META-INF/TESTKEY.RSA (OK – compressed)
    7806 AndroidManifest.xml (OK – compressed)
    8974 assets/www/cordova-js-src/android/nativeapiprovider.js (OK – compressed)
    9752 assets/www/cordova-js-src/android/promptbasednativeapi.js (OK – compressed)



2295604 res/drawable-xhdpi-v4/icon.png (OK)
 2302852 res/drawable-xxhdpi-v4/icon.png (OK)
 2314932 res/drawable-xxxhdpi-v4/icon.png (OK)
 2331845 res/xml/config.xml (OK – compressed)
 2333704 resources.arsc (OK)
 2337101 classes.dex (OK – compressed)
Verification succesful.

That is good sign that apk successfully optimize and ready for google play :-)

 ls -l | grep apk
-rw-rw-r– 1 alamsyah alamsyah 2402681 Okt  2 16:46 android-release-unsigned.apk
-rw-rw-r– 1 alamsyah alamsyah 2402707 Okt  2 16:50 test.apk

Quick update youtube-dl through pip

I use youtube-dl for download video from youtube. This program is very straightforward and came with plenty of options. One day I got error message that start with ‘encrypted signature’ . After look around I was told to upgrade my youtube-dl into latest version.

$ sudo dpkg –get-selections | grep youtube
youtube-dl                    install


Since I use pip for install this software then pip install –upgrade is come to rescue.

$ sudo pip install –upgrade youtube_dl
Downloading/unpacking youtube-dl from
  Downloading youtube_dl-2015.09.22-py2.py3-none-any.whl (1.0MB): 1.0MB downloaded
Installing collected packages: youtube-dl
  Found existing installation: youtube-dl 2014.02.17
    Not uninstalling youtube-dl at /usr/lib/python2.7/dist-packages, owned by OS
Successfully installed youtube-dl
Cleaning up…

$ youtube-dl –version

Don’t update my resolv.conf

Yesterday my cousin borrow my laptop. Using guess account on my peppermint OS 5 He surf many site without hassle. This morning I got problem with dns. I see many messages around ‘dns probe no internet’ . I guess my cousin doing something with laptop but when I see my dig result i got nothing.

Try cat /etc/resolv.conf I see no nameserver beside which is common . I decide to add more entry :

# cat /etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)

save the file.

# resolvconf -d IFACE wlan0 --disable-updates