MySQL: CHARSET from latin1 to utf8
Put it into your sh startup script (I use alias scpresume='rsync --partial --progress --rsh=ssh' in bash). When a file transfer via scp has aborted, just use scpresume instead of scp and rsync will copy only the parts of the file that haven't yet been transmitted. Show Sample Output
getent allows to get the contents of several databases in their native file format even if they are not actually in /etc. For example, if you are using a LDAP or a DB to authenticate your users, you won't find their info by catting /etc/passwd, but "getent passwd" will concatenate /etc/passwd to the LDAP/DB. Show Sample Output
Do it.
This command does a tally of concurrent active connections from single IPs and prints out those IPs that have the most active concurrent connections. VERY useful in determining the source of a DoS or DDoS attack. Show Sample Output
Displays a calendar. Show Sample Output
Uses the fabulous Hpricot library to parse HTML from Ruby. Extracts all elements of "command' class and displays unescaped text from inside these elements. The following command can help install dependencies (apart from Ruby itself)
gem sources -a http://gems.github.com && sudo gem install why-hpricot
Search manpages for a keyword. Very useful when you don't know where to find the information. Show Sample Output
Display a passive popup during seconds. Additionnaly, --title can be used to set the title of the popup. This is a nice way to communicate with a desktop user of a machine you have an SSH access on : DISPLAY=:0 sudo -u $user -H kdialog --passivepopup "Hello you" 10 --title "cli IM"
Very useful when the ssh key of a host has changed and ssh refuses to connect to the machine, while giving you the line number that has changed in ~/.ssh/known_hosts.
This is the simple revision number on stdout, that can be fed to any useful/fun script of yours. Setting LC_ALL is useful if you use another locale, in which case "Revision" is translated and cannot be found. I use this with doxygen to insert my source files revisions into the doc. An example in Doxyfile: FILE_VERSION_FILTER = "function svn_filter { LC_ALL=C svn info $1 | grep Revision | awk '{print $2}'; }; svn_filter" Share your ideas about what to do with the revision number ! Show Sample Output
Modify the script for your username and password, and save it as a script. Run the script, and enjoy ./tweet
Useful for a cron job that runs nightly, gzipping or alternatively deleting files from a specific directory that are older than 10 days (in this case)
Useful to detect which process is causing system loads. It shows process PID so as we can take further actions. Show Sample Output
Very useful for finding the largest files and subdirectories at any given point. Any user can run it from current location just when need to know their largest files and subtdirectories from a certain point down as well. Show Sample Output
check your load with top... Start more of these jobs to get an multi-core cpu busy... Show Sample Output
Simple use of ImageMagick identify function. Show Sample Output
This is just one method of checking to see if an IP is blocked via IP tables or CSF. Simple and to the point. Replace xx.xx.xx.xx with the IP you wish to check. Show Sample Output
Very useful for finding all files over a specified size, such as out of control log files chewing up all available disk space. Fedora Core x specific version. Show Sample Output
Read 32GB zero's and throw them away. How fast is your system? Show Sample Output
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