1.show line number
export PS4='+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}: '
2.debug apart of code
set -x
THE CODE BE DEBUGED
set +x
3.add debug flag
code like this:
DEBUG=0
_ERR_HDR_FMT="%.23s %s[%s]: "
_ERR_MSG_FMT="${_ERR_HDR_FMT}%s\n"
_log() {
if test $DEBUG -eq 1 ; then
printf "$_ERR_MSG_FMT" $(date +%F.%T.%N) ${BASH_SOURCE[1]##*/} ${BASH_LINENO[0]} "${@}"
fi
}
and run as this:
DEBUG=1 ./test.sh
-
add text to the head of file, using
cat - $file, link stdout to the head of $filefile=data.txt echo "test text to head of file" | cat - $file >$file.new
-
merge two lines to one
sed 'N;s/\n/ /' 1.txt
-
print the next line of match line
sed '/33/{n;p}' 1.txt
-
merge all line to one
sed ':a;N;s/\n/ /;ba;' 1.txt
-
print the last line
tail -n 1 1.txt tail -1 1.txt sed -n '$p' 1.txt awk 'END{print}' 1.txt
-
output multiple lines
cat <<TT-Test-111 This is line 1 of message This is line 2 of message This is line 3 of message TT-Test-111
-
comment block code, it is useful for debuging
: <<COMMENTBLOCK echo "abc" echo "123" COMMENTBLOCK
: <<DEBUGXXX for file in * do cat "$file" done DEBUGXXX
-
array
DISKS=(
$(ls /dev/sd*)) LENGTH=$ {DISKS[@]} for x in "${DISKS[@]}" ; do echo $x done -
test expr is equal to [ expr ], for more help
man test. some example:This code is from /etc/init.d/nfs
Source networking configuration.
[ -f /etc/sysconfig/network ] && . /etc/sysconfig/network
Check that networking is up.
[ "${NETWORKING}" != "yes" ] && exit 6 [ -x /usr/sbin/rpc.nfsd ] || exit 5
-
print function name:
function test_func() { echo "Current $FUNCNAME,
$FUNCNAME => ($ {FUNCNAME[@]})" } test_func
for more info:
1.cursor moving
"\033[<L>;<C>H" move curse to specify position, <L> is line number, <C> is crow number
"\033[<N>A" move the current curse up N lines.(remember to replace <N> to digits)
"\033[<N>B" move down
"\033[<N>C" move right
"\033[<N>D" move left
2.change color
syntax:
echo -e '\E[COLOR1;COLOR2mSome text goes here.'
FGRED=`printf "\033[31m"`
FGCYAN=`printf "\033[36m"`
BGRED=`printf "\033[41m"`
FGBLUE=`printf "\033[35m"`
BGGREEN=`printf "\033[42m"`
NORMAL=`printf "\033[m"`
echo "${FGBLUE} Text in blue ${NORMAL}"
echo "Text normal"
echo "${BGRED} Background in red"
echo "${BGGREEN} Background in Green and back to Normal ${NORMAL}"
code color/编码 颜色/动作
0 重新设置属性到缺省设置
1 设置粗体
2 设置一半亮度（模拟彩色显示器的颜色）
4 设置下划线（模拟彩色显示器的颜色）
5 设置闪烁
7 设置反向图象
22 设置一般密度
24 关闭下划线
25 关闭闪烁
27 关闭反向图象
30 设置黑色前景
31 设置红色前景
32 设置绿色前景
33 设置棕色前景
34 设置蓝色前景
35 设置紫色前景
36 设置青色前景
37 设置白色前景
38 在缺省的前景颜色上设置下划线
39 在缺省的前景颜色上关闭下划线
40 设置黑色背景
41 设置红色背景
42 设置绿色背景
43 设置棕色背景
44 设置蓝色背景
45 设置紫色背景
46 设置青色背景
47 设置白色背景
49 设置缺省黑色背景
echo -e "\033[1mThis is bold text.\033[0m"
echo -e "\033[4mThis is underlined text.\033[0m"
echo -e '\E[34;47mThis prints in blue.'; tput sgr0
echo -e '\E[33;44m'"yellow text on blue background"; tput sgr0
echo -e '\E[1;33;44m'"BOLD yellow text on blue background"; tput sgr0
reference:
reference:
reference:
- [getwifi (a bash script)] (http://sourceforge.net/projects/getwifi/)
- [Linux 下的wpa_supplicant工具关联无线网络命令行] (www.ixpub.net/blog-16986440-414984.html)
- [wpa_supplicant无线网络配置] (http://blog.csdn.net/simeone18/article/details/8580592)
- [wpa_cli调试工具的使用] (http://blog.csdn.net/ylyuanlu/article/details/7634925)
- [用wpa_cli 连接无线网络] (http://blog.csdn.net/yuzaipiaofei/article/details/6620084)
- [无线 编程] (http://blog.csdn.net/wl_haanel/article/details/5312295)
Reference:
- 鳥哥的 Linux 私房菜 軟體磁碟陣列 (Software RAID)
- Linux建立Raid
- mdadm详解
- How to determine RAID controller type and a model
- Linux: How to delete a partition with fdisk command
- Linux DD命令删除掉分区shell
- 使用libparted库写个程序来打印我们的设备信息
- linux fdisk 分区、格式化、挂载！
- 关于删除软raid设备md0
- Linux软Raid配置
- mdadm使用详解及RAID 5简单分析
a script for generating configure file, which can use to generate Makefile
A python script transfer c header file which contains lots of data structures to a dot script, and then convert to a image file
Project MoniTor, for windows and linux platform
System infor monitor (cpu,mem,ps,FD,network)
Get network RT speed and NIC speed
iscsi tools