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--- daily_admin_issues [2011/12/22 14:32] – [Daily Admin Issue] k2patel
+++ daily_admin_issues [2021/09/21 16:13] (current) – [Force chronyc time sync] k2patel
@@ Line 3: / Line 3: @@
    * [[ sar reporting ]]
    * [[ Kernel Tuning ]]
+   * [[ inotify monitor ]]
+   * [[ Security ]]
+==== Centos 6 to 7 Upgrade ====
+I've followed [[https://wiki.centos.org/TipsAndTricks/CentOSUpgradeTool]] without issue.\\
+But after reboot i've started seeing following error "libpcre.so.0" not found.
+After looking further it appeared to the issue with "grep" package.
+After Successful reboot simply downgrade the grep package and error will disappear.
+Also it is good idea to place selinux in permissive mode before you start upgrade.
 ==== Drupal Throw watchdog error ====
@@ Line 20: / Line 33: @@
 )
 </code>
 ==== Locale Issue on Linux ====
@@ Line 79: / Line 91: @@
  touch /.autorelabel
  reboot
+</code>
+=== Reset context on Specific Folder ===
+<code bash>
+  restorecon -Rv /var/www/html
 </code>
@@ Line 88: / Line 105: @@
 </code>
+=== Web Application can not connect to db ===
+This behavior can not get logged in audit.log some time.\\
+which make it harder to troubleshoot. you can manually enabled network connection for db on http context.\\
+<note> -P option is to make permanent change </note>
+<code bash>
+setsebool -P httpd_can_network_connect_db on
+</code>
 ==== Telnet IMAP Test ====
@@ Line 129: / Line 155: @@
 You are all set.
+=== Allow Other computer ===
+In order to allow other computer on network to access your proxy use following command.
+<note warning>This is Open Proxy please use proper firewall rule to allow access.</note>
+<code bash>
+ssh -N -f -D 0.0.0.0:9933 k2patel@vedi.k2patel.in
+</code>
+Now setup other computer's browser to proxy socks5 host <your IP> port <9933>.\\
+That should do it
+==== Download java using wget ====
+<code bash>
+wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u51-b16/jdk-8u51-linux-i586.rpm
+</code>
+==== Force chronyc/chronyd/chrony time sync ====
+<code bash>
+chronyc -a 'burst 4/4'
+chronyc -a makestep
+</code>
+==== Multiple BAR 13: no space for [io size 0x1000] ====
+:!: Multiple BAR 13: no space for [io size 0x1000] messages seen on RHEL guest on VMWare ESX vCenter 6.0 host at boot.
+best bet is to contact vmware, but temporary fix should be as follow
+<code bash>
+try booting with pci=nocrs kernel command line option.
+This parameter is used to discard ACPI resource information for various devices.
+</code>