BEAUTY AND PLAY
ABOUT In computing, a hex dump is a hexadecimal view (on screen or paper) of computer data, from RAM or from a file or storage device. Looking at a hex dump of data is commonly done as a part of debugging, or of reverse engineering. In a hex dump, each byte (8-bits) is represented as …
Continue reading “Travel through a wonderful command named hexdump PART 1”
commandline session $cat bash.txt hack hacker $head bash.txt hack hacker $head -n 1 bash.txt hack $head -n 2 bash.txt hack hacker $head -n 3 bash.txt hack hacker $head -v -n 1 bash.txt ==> bash.txt bash.txt <== hack hacker $ http://www.gnu.org/software/coreutils/manual/html_node/head-invocation.html $ head -n 1 qsort.c #include $ head -n 2 qsort.c #include $ head -n …
ABOUT hung_task_timeout_secs if a task(process) is hung then hung_task_timeout_secs value decides if the hung task needs no reboot or reboot after n seconds LINUX KERNEL RELATED PARAMETER$cat /proc/sys/kernel/hung_task_timeout_secs120$ $echo 0 | sudo tee –append /proc/sys/kernel/ hung_task_timeout_secs0$sudo cat /proc/sys/kernel/hung_task_timeout_secs0$ When a task in D state did not get scheduled for more thanthis value report a warning.This …
Continue reading “hung_task_timeout_secs( topic related to linux kernel hangup )”
$sudo bundle install Fetching gem metadata from https://rubygems.org/…….. Fetching gem metadata from https://rubygems.org/.. Resolving dependencies… Using rake (0.9.2.2) Installing RedCloth (4.2.9) Installing chunky_png (1.2.5) Installing fast-stemmer (1.0.1) Installing classifier (1.3.3) Installing fssm (0.2.9) Installing sass (3.2.9) Installing compass (0.12.2) Installing directory_watcher (1.4.1) Installing haml (3.1.7) Installing kramdown (0.13.8) Installing liquid (2.3.0) Installing syntax (1.0.0) Installing …
commandline session $getopt hello — $getopt helloo — $getopt hellooo — $getopt hellooo how — how $getopt hellooo how are — how are $getopt h how are — how are $getopt h h h — h h $getopt ab -a -a — $getopt ab -ab -a -b — $getopt ab -ab -R getopt: invalid option …
TYPICAL COMMANDLINE SESSION RELATED [bash] $ypdomainname ypdomainname: Local domain name not set $ypdomainname -A debian.local $ypdomainname -a debian $ypdomainname -i 127.0.1.1 $ [/bash]
commandline session $vmstat -s 1995396 K total memory 1197836 K used memory 599976 K active memory 483048 K inactive memory 797560 K free memory 49620 K buffer memory 648028 K swap cache 5843964 K total swap 0 K used swap 5843964 K free swap 261891 non-nice user cpu ticks 534 nice user cpu ticks 68515 …
Continue reading “vmstat . more on virtual memory statistics”