Has anyone seen this happen? On several Ubuntu server systems (10.04, 14.04, 15.10), I'll be scrolling through the bash history with the up-arrow, and suddenly there will be a ton a code with the word "tideway" used in it very often. I'll check the dot-bash_history file, and sure enough there are large sections of script/code in there which I obviously did not type.

Where did it come from? How do I stop it?

Here's a short sample:

tw_command() { cpuspeed=`egrep '^(cpu MHz|cpu clock|clock)' /proc/cpuinfo | cut -f2 -d: | sed -e 's/\.[0-9]*//' -e 's/Mhz//i' -e 's/ //g' | head -n 1`; cputype=`egrep '^cpu[^a-z]*:' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; if [ "${cputype}" = "" ]; then cputype=`egrep '^model name' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; fi; if [ "${cputype}" = "" ]; then cputype=`egrep '^arch' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; fi; if [ "${cputype}" = "" ]; then cputype=`egrep '^(cpu model|family|vendor_id|machine|Processor)' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; fi; logical=`egrep '^[pP]rocessor' /proc/cpuinfo | sort -u | wc -l`; physical=0; cores=0; threads_per_core=0; if [ "`echo $cputype | cut -c-2`" = "PA" ]; then cpufamily=`egrep '^(cpu family)' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; if [ "`echo $cpufamily | cut -c-7`" = "PA-RISC" ]; then cputype="${cp(tideway_i=__TIDEWAY; echo ${tideway_i}_CMD_START__; tw_command; echo ${tideway_i}_CMD_END__) tw_command() { cpuspeed=`egrep '^(cpu MHz|cpu clock|clock)' /proc/cpuinfo | cut -f2 -d: | sed -e 's/\.[0-9]*//' -e 's/Mhz//i' -e 's/ //g' | head -n 1`; cputype=`egrep '^cpu[^a-z]*:' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; if [ "${cputype}" = "" ]; then cputype=`egrep '^model name' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; fi; if [ "${cputype}" = "" ]; then cputype=`egrep '^arch' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; fi; if [ "${cputype}" = "" ]; then cputype=`egrep '^(cpu model|family|vendor_id|machine|Processor)' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; fi; logical=`egrep '^[pP]rocessor' /proc/cpuinfo | sort -u | wc -l`; physical=0; cores=0; threads_per_core=0; if [ "`echo $cputype | cut -c-2`" = "PA" ]; then cpufamily=`egrep '^(cpu family)' /proc/cpuinfo | sort -u | cut -f2 -d: | sed -e 's/^ //' | head -n 1`; if [ "`echo $cpufamily | cut -c-7`" = "PA-RISC" ]; then cputype="${cpprintf("hostid: ");