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p er-cpu variables are widely used in Linux kernel such as per-cpu counters, per-cpu cache. The advantages of per-cpu variab...

p rintk is a nature and basic tool for debugging kernel. Sometimes it is the only tool we have. Here are some tips of using printk. 1) p...

The slub allocator in Linux has useful debug features. Such as poisoning, readzone checking, and allocate/free traces with t...

Now let's talk about the Linux kernel virtual address space on 64-bit ARM CPU. You can find information...

The 32-bit ARM CPU can address up to 2^32 = 4GB address*. It's not big enough in present days, since the size of available...

startup_message off termcapinfo xterm ti@:te@ defscrollback 5000 #caption always "%{= kw}%-w%{= BW}%n %t%{-}%+w %-= @%H - %LD %d %LM - ...

set nu syntax on colorscheme evening set cul set hlsearch set ruler set ai set nojoinspaces set formatoptions=qtcor "set foldmethod=mar...

# .bashrc # Source global definitions if [ -f /etc/bashrc ]; then . /etc/bashrc fi # check terminal if [ "$TERM" = "rxvt-u...

put this functions in the ~/.bashrc # convert a number into decimal format n2d() { perl -e "printf \"%d\n\", $@"...

click on edit>startup settings to edit the vimrc in windows "set defautl window size set lines=24 set columns=90 "set default f...

# setting WORKDIR=`pwd` # get all file list echo "get all file list" rm ctags.Uranus ctags.utopia 2>/dev/null find $WORKDIR/Ura...

1) dump_stack

ab tl Tlist ab tls TlistSync where Tlist is for ctag list TlistSync is for syncing the ctag navigating window with the current cursor

syntax on set nu set ruler set hlsearch set cul colorscheme evenin...

To enable X forwarding, try the following command ssh -X xxx.xxx.xxx.xxx than we can launch a program with GUI through ssh. Sometimes it doe...

The lock file of VirtualBox is placed in /tmp/.vbox-[user name]-ipc

It is a common mistake to fork a child process without calling waitpid() to wait for the termination of the child process. Without a wait() ...

killtree () { for child in $(ps -o pid= --ppid $1) do killtree $child done echo "kill -9 $1...

It is very easy to read "words" in a bash script. But what if you want to read a line in a text file? I have this problem today, A...

In the previous article "vlan tag under vmware/virtualbox", I found that the e1000 network driver cannot insert vlan tag to frames...