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      <page pageid="121" ns="0" title="Redhat - fedora service startup">
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          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">== run levels ==

Service start and stop scrips are associated with run levels 0-6.  Each has a corresponding directory in /etc/rc.d.  For each run level, a script beginning with K stops the service, whereas a script beginning with S starts the service.


== starting services on boot ==

In order to start it automatically on every system boot, run

 # systemctl enable sshd.service

Likewise, you can remove it from system startup

 # systemctl disable sshd.service

If you would like to see a list of all available managed services, run

 # systemctl -a

== chkconfig method ==


===listing existing services=== 

listing existing services and the run level start configurations

 # chkconfig --list

example: 

 # chkconfig --list | grep sshd
 sshd            0:off   1:off   2:on    3:on    4:on    5:on    6:off

corresponding start/stop scripts

 # grep -r -m 1 sshd /etc/rc.d/*  | sort -n
 /etc/rc.d/init.d/sshd:# processname: sshd
 /etc/rc.d/rc0.d/K25sshd:# processname: sshd
 /etc/rc.d/rc1.d/K25sshd:# processname: sshd
 /etc/rc.d/rc2.d/S55sshd:# processname: sshd
 /etc/rc.d/rc3.d/S55sshd:# processname: sshd
 /etc/rc.d/rc4.d/S55sshd:# processname: sshd
 /etc/rc.d/rc5.d/S55sshd:# processname: sshd
 /etc/rc.d/rc6.d/K25sshd:# processname: sshd

===adding new services===

adding a new service if isn't already listed.  


 # '''chkconfig --add &lt;name&gt;'''

name = service name as its start script appears in /etc/init.d/ or you will get an error

example

 # '''chkconfig --add snmpd'''
 error reading information on service badserviced: Invalid argument

example...

 # '''chkconfig --add snmpd'''

check service just added, notice all run levels will be off by default

 # '''chkconfig --list | grep nrpe'''
 nrpe            0:off   1:off   2:off   3:off   4:off   5:off   6:off

===setting the run levels===

 # chkconfig --level &lt;levels&gt; &lt;name&gt; on

example, setting levels 2-5...

 # '''chkconfig --level 2345 snmpd on'''

==misc info==
 # '''chkconfig sshd on 
on fedora 17, the above command creates a symlink in a subdir of /etc/systemd/system/



[[category:redhat]]</rev>
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      <page pageid="262" ns="0" title="Removing spaces from filenames">
        <revisions>
          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">Remove all spaces from all files in current directory: 

Shell one-liner 

 &lt;p&gt;IFS=$'\n';for f in `find .`; do file=$(echo $f | tr [:blank:] '_'); [ -e $f ] &amp;&amp; [ ! -e $file ] &amp;&amp; mv &quot;$f&quot; $file;done;unset IFS Script 


[[Category:Linux]]</rev>
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