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--- how_to [2016/08/18 15:57] – [How to drop all table from database (mysql)] k2patel
+++ how_to [2020/08/10 02:35] (current) – external edit 127.0.0.1
@@ Line 426: / Line 426: @@
 ==== Creating patch for rpm ====
+this can be used as '%patch0 -p1 -b <file_name>'
 <code bash>
 diff -ru hdf-4.2.12-orig hdf-4.2.12-diff >| ../SOURCES/hdf-4.2.12.example.patch
@@ Line 438: / Line 439: @@
 </code>
 </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>