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how_to [2016/08/18 15:55] – [Configure option for Fedora / Redhat] k2patelhow_to [2020/08/10 02:35] (current) – external edit 127.0.0.1
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 To drop all the table in the mysql database - use the following command. To drop all the table in the mysql database - use the following command.
 +<WRAP prewrap>
 <code mysql> <code mysql>
 mysqldump -u[USERNAME] -p[PASSWORD] --add-drop-table --no-data [DATABASE] | grep ^DROP | mysql -u[USERNAME] -p[PASSWORD] [DATABASE] mysqldump -u[USERNAME] -p[PASSWORD] --add-drop-table --no-data [DATABASE] | grep ^DROP | mysql -u[USERNAME] -p[PASSWORD] [DATABASE]
 </code> </code>
 +</WRAP>
  
 ==== How to list pear using php ==== ==== How to list pear using php ====
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 If you need to run cron with your own php.ini and send result to mail use following. If you need to run cron with your own php.ini and send result to mail use following.
 +<WRAP prewrap>
 <code bash> <code bash>
 */1 */2 * * * /usr/local/bin/php --php-ini /srv/www/conf/php.ini /srv/www/public_html/cron.php | /usr/bin/mail -s "Output of crontab" xyz@yahoo.com */1 */2 * * * /usr/local/bin/php --php-ini /srv/www/conf/php.ini /srv/www/public_html/cron.php | /usr/bin/mail -s "Output of crontab" xyz@yahoo.com
 </code> </code>
 +</WRAP>
 ==== Exit Codes ==== ==== Exit Codes ====
 At some point you feel like there is no exit code documentation and you want find you what should it return.\\ At some point you feel like there is no exit code documentation and you want find you what should it return.\\
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 **Step 2** : Create Raid Drive. ( this command will create "/dev/md10" ) **Step 2** : Create Raid Drive. ( this command will create "/dev/md10" )
 +<WRAP prewrap>
 <code bash> <code bash>
 mdadm --create --level=10 --raid-devices=4 --spare-devices=0 --chunk=128 --layout=f2 /dev/md10 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 mdadm --create --level=10 --raid-devices=4 --spare-devices=0 --chunk=128 --layout=f2 /dev/md10 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1
 </code> </code>
 +</WRAP>
  
 **Step 3**: Format Drive ( I am formatting for XFS )  **Step 3**: Format Drive ( I am formatting for XFS ) 
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 ==== Creating patch for rpm ==== ==== Creating patch for rpm ====
 +this can be used as '%patch0 -p1 -b <file_name>'
 <code bash> <code bash>
 diff -ru hdf-4.2.12-orig hdf-4.2.12-diff >| ../SOURCES/hdf-4.2.12.example.patch diff -ru hdf-4.2.12-orig hdf-4.2.12-diff >| ../SOURCES/hdf-4.2.12.example.patch
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 </code> </code>
 </WRAP> </WRAP>
 +
 +==== Run single command parallel'y with diff values ====
 +<WRAP prewrap>
 +<code bash>
 +(echo "http://test.k2patel.in"; echo "http://test.ornl.gov"; echo "http://yahoo.com" ) | parallel 'ab -n 50 -c 50 {}'
 +</code>
 +</WRAP>
 +
 +==== Print yum variable value ====
 +<code python>
 +import yum
 +import pprint 
 +
 +yvar = yum.YumBase()
 +pprint.pprint(yvar.conf.yumvar, width=1)
 +</code>
 +
 +==== Disable Predictable interface name in RHEL / CentOS ====
 +Pass following during boot kernel command line.
 +<code bash>
 +net.ifnames=0
 +</code>
how_to.1471535750.txt.gz · Last modified: 2020/08/10 02:30 (external edit)