sudo apt-get install vino
Configure vino, run
vino-preferences
XFCE settings > Session and Startup > Add
Name: vino Description: vino desktop sharing Command: /usr/lib/vino/vino-server
Now restart the computer.
See Ubuntu
After i type
iptables -F
server goes down. Can’t connect to web or ssh, seems all connection is locked by iptables.
This is because the chain policy for the firewall input chain was set to DROP
check with “iptables –list” you will see “Chain INPUT (policy DROP)”.
[root@server52 ~]# iptables -L |grep Chain Chain INPUT (policy DROP) Chain FORWARD (policy DROP) Chain OUTPUT (policy DROP) Chain GALLOW (2 references) Chain INVALID (2 references) Chain INVDROP (10 references) Chain LOGDROPIN (1 references) Chain LOGDROPOUT (1 references) [root@server52 ~]#
If this is the case, before you run a flush, ensure you set the input chain policy to ACCEPT by running.
iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables -F service iptables save
Then you will be able to run iptables -F without any problem.
When you try modifying firewall rules, better set a cronjob with following commands that run every 5 or 10 minutes, so if you get locked out, you will be able to get access again after the cronjob runs.
iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables -F
See iptables
NOTE: CentOS 5 reached its End of Life on March 31, 2017. For installing VNC desktop on CentOS 7, see Install Xfce VNC remote desktop on CentOS 7
To find available desktop environments
yum grouplist
To install gnome
yum groupinstall "GNOME Desktop Environment"
For KDE
yum groupinstall "KDE (K Desktop Environment)"
For XFCE, install
yum groupinstall "XFCE"
XFCE file size in fedora 12 Total download size: 105 M, Installed size: 363 M
yum install vnc vnc-server
[root@pc7 ~]# vncserver You will require a password to access your desktops. Password: Verify: xauth: creating new authority file /root/.Xauthority New 'pc7.localdomain:1 (root)' desktop is pc7.localdomain:1 Creating default startup script /root/.vnc/xstartup Starting applications specified in /root/.vnc/xstartup Log file is /root/.vnc/pc7.localdomain:1.log [root@pc7 ~]#
Now stop vnc server with
pkill -9 vnc rm -rf /tmp/.X*
vncpasswd /root/.vnc/passwd
[root@pc7 ~]# vncpasswd /root/.vnc/passwd Password: Verify: [root@pc7 ~]#
vi /root/.vnc/xstartup
Find
twm &
Replace it with
For Gnome
gnome-session &
For XFCE
startxfce4 &
For KDE
startkde &
For FVWM2
fvwm2 &
After change, it will look like
[root@pc7 ~]# cat /root/.vnc/xstartup #!/bin/sh vncconfig -iconic & # Uncomment the following two lines for normal desktop: # unset SESSION_MANAGER # exec /etc/X11/xinit/xinitrc [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources xsetroot -solid grey xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" & gnome-session & [root@pc7 ~]#
vi /etc/sysconfig/vncservers
Add
VNCSERVERS="1:flashwebhost"
[root@pc7 ~]# vncserver New 'pc7.localdomain:1 (root)' desktop is pc7.localdomain:1 Starting applications specified in /root/.vnc/xstartup Log file is /root/.vnc/pc7.localdomain:1.log [root@pc7 ~]#
Start tightVNC Viewer, connect to IP-ADDR:1 to connect as user root.
See VNC server
This is caused by multiple versions of libjpeg installed on the server.
Check for libjpeg in library folders.
Lib folders can be find by checking /etc/ld.so.conf
root@serv02 [/usr/lib]# cat /etc/ld.so.conf include ld.so.conf.d/*.conf /usr/lib64/ /usr/local/lib /usr/lib root@serv02 [/usr/lib]# cd /usr/lib64/
Check version of libjpeg installed
cd /usr/lib64/ ls -la | grep jpeg cd /usr/local/lib ls -la | grep jpeg cd /usr/lib ls -la | grep jpeg
Folder /usr/lib64/ have libjpeg.so.62.0.0 installed.
root@serv02 [/usr/lib]# cd /usr/lib64/ root@serv02 [/usr/lib64]# ls -la | grep jpeg lrwxrwxrwx 1 root root 17 Mar 8 09:54 libjpeg.so -> libjpeg.so.62.0.0* lrwxrwxrwx 1 root root 17 Mar 8 09:14 libjpeg.so.62 -> libjpeg.so.62.0.0* -rwxr-xr-x 1 root root 138936 Jan 6 2007 libjpeg.so.62.0.0* root@serv02 [/usr/lib64]#
Folder /usr/local/lib have libjpeg.so.8.3.0 installed
root@serv02 [/usr/local/lib]# ls -la | grep jpeg drwxr-xr-x 4 uploadin users 12288 Mar 9 11:43 jpeg-8c/ -rw-r--r-- 1 root root 986681 Jan 16 10:22 jpegsrc.v8c.tar.gz -rw-r--r-- 1 root root 1759458 Mar 9 11:43 libjpeg.a -rwxr-xr-x 1 root root 916 Mar 9 11:43 libjpeg.la* lrwxrwxrwx 1 root root 16 Mar 9 11:43 libjpeg.so -> libjpeg.so.8.3.0* lrwxrwxrwx 1 root root 16 Mar 8 15:36 libjpeg.so.7 -> libjpeg.so.7.0.0* -rwxr-xr-x 1 root root 335442 Mar 8 15:36 libjpeg.so.7.0.0* lrwxrwxrwx 1 root root 16 Mar 9 11:43 libjpeg.so.8 -> libjpeg.so.8.3.0* -rwxr-xr-x 1 root root 968498 Mar 9 11:43 libjpeg.so.8.3.0* root@serv02 [/usr/local/lib]#
To fix, deleted all libjpeg.so.62.0.0 files
cd /usr/lib64/ rm -f libjpeg.so.*
Now create a symlink
cd /usr/lib64/ ln -s /usr/local/lib/libjpeg.so.8.3.0 libjpeg.so.62
Check what provides libjpeg
yum whatprovides "*/libjpeg.so.62.0.0"
See if libjpeg installed
rpm -qa | grep libjpeg
root@serv02 [/usr/local/lib]# rpm -qa | grep libjpeg libjpeg-6b-37 libjpeg-devel-6b-37 libjpeg-6b-37 root@serv02 [/usr/local/lib]#
Uninstall libjpeg
rpm -e --nodeps libjpeg-6b-37 libjpeg-devel-6b-37 libjpeg-6b-37
Edit /etc/yum.conf
Disable auto updating libjpeg by adding
libjpeg*
in exclude line.
See Errors
This method is for CentOS 6. On newer systems, you may need to use systemd or enable rc-local service for /etc/rc.local to work./
vi /home/shoutcast/shoutcast.sh
Add
#!/bin/bash killall sc_serv killall sc_trans_linux cd /home/shoutcast/ ./sc_serv >/dev/null & cd /home/shoutcast/sc_trans_040 ./sc_trans_linux >/dev/null &
Set permission
chmod 755 /home/shoutcast/shoutcast.sh
To start on boot, we add it to /etc/rc.local
vi /etc/rc.local
At the end of the file add as new line
/home/shoutcast/shoutcast.sh
See Shoutcast
sc_trans can play list of mp3 files to shoutcast server so your online radio station will be online even if you are not online.
cd /home mkdir shoutcast cd shoutcast wget http://yp.shoutcast.com/downloads/sc_trans_posix_040.tgz tar -zxvf sc_trans_posix_040.tgz cd sc_trans_040
Upload your MP3 files to folder
/home/shoutcast/sc_trans_040/mp3
To create a play list, run
find ./mp3 -type f -name "*.mp3" > playlist.lst
Find
PlaylistFile=example.lst
Replace With
PlaylistFile=playlist.lst
Find
ServerIP=myserver.com
Replace with IP of server on which you run shoutcast server.
ServerIP=server28.hosthat.com
Find
ServerPort=8000
8000 is default shoutcast server port. Change it if you use non default port.
Find
Password=
Set the password you set in shoutcast server in Password= line.
Run
./sc_trans_linux
In Windows Media player, file > open url, enter
http://server28.hosthat.com:8000
start playing the songs.
See shoutcast
Download linux version from site
http://www.shoutcast.com/download-files
cd /home mkdir shoutcast cd shoutcast wget http://yp.shoutcast.com/downloads/sc1-9-8/sc_serv_1.9.8_Linux.tar.gz tar -zxvf sc_serv_1.9.8_Linux.tar.gz
Now edit sc_serv.conf
vi sc_serv.conf
Find
Password=changeme
Replace changeme with secure password.
Other important options are
MaxUser PortBase
To start, run
./sc_serv
To start in background, run
./sc_serv &
After you run, you will see
[root@server28 shoutcast]# ./sc_serv ******************************************************************************* ** SHOUTcast Distributed Network Audio Server ** Copyright (C) 1998-2004 Nullsoft, Inc. All Rights Reserved. ** Use "sc_serv filename.ini" to specify an ini file. ******************************************************************************* Event log: <08/14/09@18:37:38> [SHOUTcast] DNAS/Linux v1.9.8 (Feb 28 2007) starting up... <08/14/09@18:37:38> [main] pid: 27910 <08/14/09@18:37:38> [main] loaded config from sc_serv.conf <08/14/09@18:37:38> [main] initializing (usermax:32 portbase:8000)... <08/14/09@18:37:38> [main] No ban file found (sc_serv.ban) <08/14/09@18:37:38> [main] No rip file found (sc_serv.rip) <08/14/09@18:37:38> [main] opening source socket <08/14/09@18:37:38> [main] source thread starting <08/14/09@18:37:38> [main] opening client socket <08/14/09@18:37:38> [source] listening for connection on port 8001 <08/14/09@18:37:38> [main] Client Stream thread [0] starting <08/14/09@18:37:38> [main] client main thread starting <08/14/09@18:38:05> [dest: 59.98.136.119] server unavailable, disconnecting <08/14/09@18:38:06> [dest: 59.98.136.119] Invalid resource request(/favicon.ico) <08/14/09@18:39:45> [sleeping] 0 listeners (0 unique)
By default shoutcast run on port 8000.
If you go to
http://server28.hosthat.com:8000/
You will get
ICY 401 Service Unavailable icy-notice1: SHOUTcast Distributed Network Audio Server/Linux v1.9.8 icy-notice2:The resource requested is currently unavailable
See shoutcast
On installing postfix from source, when running the make install command I get an error
bin/postconf: error while loading shared libraries: libmysqlclient.so.16: cannot open shared object file: No such file or directory
This is because MySQL library path is not in system library locations.
To fix the error edit /etc/ld.so.conf
vi /etc/ld.so.conf
Add the following line to the end of the file
/usr/lib/mysql
Now run ldconfig
ldconfig
configure: error: “mysql headers missing.”
Back to Errors
When i install php from source, i get the error
Running FastCGI Process Manager checks checking for php-fpm config file path... $prefix/etc/php-fpm.conf checking for php-fpm log file path... $prefix/logs/php-fpm.log checking for php-fpm pid file path... $prefix/logs/php-fpm.pid checking for XML configuration checking for xml2-config... no checking for xml-config... no configure: error: XML configuration could not be found
The problem is fixed by installing libxml2-devel
yum install libxml2-devel
See Errors
When compiling php from source for nginx web server, i get error
checking for cURL support... yes
checking if we should use cURL for url streams... yes
checking for cURL in default path... not found
configure: error: Please reinstall the libcurl distribution -
easy.h should be in /include/curl/
On checking, found curl-devel not installed
[root@vps1 php-5.2.8]# yum list|grep curl curl.x86_64 7.15.5-2.el5 installed curl.i386 7.15.5-2.el5 installed curl-devel.x86_64 7.15.5-2.el5 base curl-devel.i386 7.15.5-2.el5 base [root@vps1 php-5.2.8]#
The problem is fixed by installing curl-devel
yum -y install curl-devel
See Errors
On installing MySQL from source, i get error
checking for tgetent in -lncurses... no checking for tgetent in -lcurses... no checking for tgetent in -ltermcap... no checking for tgetent in -ltinfo... no checking for termcap functions library... configure: error: No curses/termcap library found
Lets search for ncurses
[root@server52 mysql-5.1.23-ndb-6.2.15]# yum list|grep ncurses Repository base is listed more than once in the configuration Repository addons is listed more than once in the configuration Repository extras is listed more than once in the configuration ncurses.x86_64 5.5-24.20060715 installed ncurses.i386 5.5-24.20060715 installed ncurses-devel.i386 5.5-24.20060715 base ncurses-devel.x86_64 5.5-24.20060715 base php-ncurses.x86_64 5.1.6-15.el5 base [root@server52 mysql-5.1.23-ndb-6.2.15]#
To fix the problem, install ncurses-devel
yum -y install ncurses-devel
On Debian/Ubuntu do
apt-cache search ncurses apt-get install libncurses5-dev
[root@server52 mysql-5.1.23-ndb-6.2.15]# yum install ncurses-devel Repository base is listed more than once in the configuration Repository addons is listed more than once in the configuration Repository extras is listed more than once in the configuration Setting up Install Process Setting up repositories Reading repository metadata in from local files Parsing package install arguments Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Downloading header for ncurses-devel to pack into transaction set. ncurses-devel-5.5-24.2006 100% |=========================| 98 kB 00:00 ---> Package ncurses-devel.x86_64 0:5.5-24.20060715 set to be updated ---> Downloading header for ncurses-devel to pack into transaction set. ncurses-devel-5.5-24.2006 100% |=========================| 98 kB 00:00 ---> Package ncurses-devel.i386 0:5.5-24.20060715 set to be updated --> Running transaction check Dependencies Resolved ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: ncurses-devel x86_64 5.5-24.20060715 base 1.7 M ncurses-devel i386 5.5-24.20060715 base 1.6 M Transaction Summary ============================================================================= Install 2 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 3.3 M Is this ok [y/N]: y Downloading Packages: (1/2): ncurses-devel-5.5- 100% |=========================| 1.7 MB 00:00 (2/2): ncurses-devel-5.5- 100% |=========================| 1.6 MB 00:00 Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Installing: ncurses-devel ######################### [1/2] Installing: ncurses-devel ######################### [2/2] Installed: ncurses-devel.x86_64 0:5.5-24.20060715 ncurses-devel.i386 0:5.5-24.20060715 Complete! [root@server52 mysql-5.1.23-ndb-6.2.15]#
See Errors