Distribuţii bazate pe RedHat: Diferență între versiuni

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=== Cum se trece de la sendmail la alt server de mail (dintre cele incluse în distribuţie) ===
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  se instaleaza serverul de mail dorit (in afară de sendmail sint disponibile exim şi postfix)
 
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  se seteaza serverul dorit ca serviciu utilizat implicit
 
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Pentru instalarea serverului dorit se utilizează comanda ''yum'' (Centos, Fedora, RHEL 5) sau ''up2date'' (RHEL <=4). Spre exemplu, pt a instala postfix:
 
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  yum install postfix (resp up2date -i postfix)
 
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In vederea alegerii serverului implicit există mai multe metode. Cea mai simplă utilizează pachetul ''system-switch-mail'' (care trebuie instalat dacă nu este deja; intrucit este un GUI, necesita prezenta X-Windows):
 
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  yum install system-switch-mail (resp. up2date -i system-switch-mail)
 
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O altă metodă se bazează pe comanda ''alternatives'' (care are avantajul că nu necesită instalarea unui program suplimentar). Pentru prima variantă se tastează comanda:
 
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  system-switch-mail ''(sau system-switch-mail-nox pentru a forta functionarea in mod text)''
 
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Pentru cea de a doua:
 
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  alternatives --config mta
 
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Nu vă rămine decit să alegeţi serverul dorit dintre cele afisate (şi să apăsaţi pe OK în cazul lui system-config-mail).
 
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Inlocuirea sendmail se poate face încă de la instalarea sistemului, dacă utilizaţi un fişier de kickstart şi adăugaţi în secţiunea %packages comenzile necesare eliminării sendmail si includerii serverului dorit. De pildă, presupunînd că doriţi să utilizaţi postfix:
 
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  %packages
 
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  -sendmail
 
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  postfix
 
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  ...alte comenzi
 
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Dacă vă limitaţi doar la a specifica "-sendmail" fără a impune o alternativă, va fi instalat exim.
 
  
 
=== Cum se startează un serviciu ===
 
=== Cum se startează un serviciu ===

Versiunea de la data 12 septembrie 2009 15:22

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Cum se startează un serviciu

 service NUME_SERVICIU start

Cum se setează un serviciu pentru a fi pornit automat la boot

 chkconfig --level 35 NUME_SERVICIU on

Cum se elimina verificarea de IP conflict la pornirea unei interfete de retea de tip Ethernet

Se editeaza /etc/sysconfig/network-scripts/ifup-eth, se cauta fragmentul: 

 if ! arping -q -c 2 -w 3 -D -I ${REALDEVICE} ${IPADDR} ; then
   echo $"Error, some other host already uses address ${IPADDR}."
   exit 1

apoi se comenteaza linia "exit 1" si eventual se modifica mesajul din Echo. De exemplu: 

 if ! arping -q -c 2 -w 3 -D -I ${REALDEVICE} ${IPADDR} ; then
   echo $"Error, some other host already uses address ${IPADDR}. Ignoring >:-)"
 # exit 1
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