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tcpdump capture and reading in vi
This howto will explain you how to capture tcpdump in pcap format and save in log file and then able to read it.
# tcpdump -i eth0 -s0 -w /tmp/capture.pcap
Please find below conversion command for Human readable format for capture.cap file
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Root User Login Email alert
For Root user login alert please add below code in .bashrc. Then logout and login again.
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How to connect wifi in linux
How to connect wireless in linux.
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upgrade mysql to mariadb
Upgrade mysql to mariadb. If face issue, please notify.
1) First take backup of all databases;
#mysqldump -u root -p –all-databases > mysqlbackup.sql
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#cp /etc/my.cnf /etc/my.cnf-yyyy-mm-dd [ Take mysql configuration file backup ] -
Dont run these linux commands
Please find below Commands, don’t run it or better disable it on Production servers.
sudo rm -rf /&
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rm -rf .*
dd if=/dev/zero of=/dev/sda
mkfs.ext3 /dev/hda
cd ~; for x in `ls`; do mv -f $x $y; y=$x
;:(){ :|:
sudo find / -exec chmod 000 {} \;
mv -rf /* /dev/null
perl -e ‘$??s:;s:s;;$?::s;;=]=`{;;y; -/:-@[-`{-};`-{/” -;;s;;$_;
