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list processes with established tcp connections (without netstat)
Uses lsof to list open network connections (file descriptors), grepping for only those in an established state

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Get all shellcode on binary file from objdump
Tired copy paste to get opcode from objdump huh ? Get more @ http://gunslingerc0de.wordpress.com

Debian Runlevel configuration tool
This tool configures system services in connection with system runlevels. It turns on/off services using the scripts in /etc/init.d/. Rcconf works with System-V style runlevel configuration. It is a TUI(Text User Interface) frontend to the update-rc.d command.

Batch file name renaming (copying or moving) w/ glob matching.

find listening ports by pid
change 24073 to your pid

convert pdf to graphic file format (jpg , png , tiff ... )
need imagemagick package

Yet Another Large Screen Clock

Moving large number of files
if you want to move with command mv large list of files than you would get following error /bin/mv: Argument list too long alternavite with exec: find /source/directory -mindepth 1 -maxdepth 1 -name '*' -exec mv {} /target/directory \;

Download all manuals RedHat 7 (CentOS/Fedora) with one command in Linux


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