Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
How to check the logrotate status?
Answer:
To check the current logrotate status, e.g. which files are covered by logrotate, what are their last processed date etc.
You can check the /var/lib/logrotate/status file
# cat /var/lib/logrotate/status
"/var/log/apache2/access.log" 2008-12-7
"/var/log/apache2/error.log" 2009-1-25
"/var/log/apache2/other_vhosts_access.log" 2009-1-25
"/var/log/apt/term.log" 2010-2-1
...
Check Debian version information
Answer:
To check the Debian version information in Debian/Ubuntu
Try:
# cat /etc/debian_version
squeeze/sid
Immediate time synchronization in RHEL/CentOS/Fedora
Answer:
If you want to sync the system time without installing ntpd package, rdate is an older way but it will do what you need.
# rdate -s ntp0.cornell.eduYou can find a list of time servers at: http://pank.org/blog/2004/08/time-server-list.html
How to get the IP address assigned to eth0 by a single command
Answer:
Only a single command is needed to return only the IP address assigned to eth0:
# echo $(ifconfig eth0 | awk -F: '/inet addr:/ {print $2}' | awk '{ print $1 }')
58.23.182.42
sed: replace in place
Answer:
Newer version of sed allow you replace a file in place, no more redirection is needed.
# sed -i 's/abc/def/g' test.txt
The above command will replace all "abc" to "def" in the file test.txt
