"Bash"의 두 판 사이의 차이
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*[http://tldp.org/LDP/Bash-Beginners-Guide/html/index.html Bash Guide for Beginners] | *[http://tldp.org/LDP/Bash-Beginners-Guide/html/index.html Bash Guide for Beginners] | ||
*[http://www.linuxconfig.org/Bash_scripting_Tutorial Bash scripting Tutorial] | *[http://www.linuxconfig.org/Bash_scripting_Tutorial Bash scripting Tutorial] | ||
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=={{c|$SHLVL}}== | =={{c|$SHLVL}}== | ||
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1 | 1 | ||
http://stackoverflow.com/a/4511483/766330 | http://stackoverflow.com/a/4511483/766330 | ||
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==Regular expression match test== | ==Regular expression match test== | ||
| 26번째 줄: | 26번째 줄: | ||
if <nowiki>[[ $gg =~ ^....grid.*$ ]]</nowiki> ; then echo $gg; fi | if <nowiki>[[ $gg =~ ^....grid.*$ ]]</nowiki> ; then echo $gg; fi | ||
[http://stackoverflow.com/a/2348495/766330] | [http://stackoverflow.com/a/2348495/766330] | ||
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=={{c|getopt}}== | =={{c|getopt}}== | ||
| 47번째 줄: | 47번째 줄: | ||
[http://stackoverflow.com/a/33151456/766330] | [http://stackoverflow.com/a/33151456/766330] | ||
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=={{c|stty}}== | =={{c|stty}}== | ||
| 53번째 줄: | 53번째 줄: | ||
stty sane | stty sane | ||
이 외 다양한 옵션에 관해서는 [http://askubuntu.com/a/454663/400331 링크]참고 | 이 외 다양한 옵션에 관해서는 [http://askubuntu.com/a/454663/400331 링크]참고 | ||
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==bash expansion : ranges== | ==bash expansion : ranges== | ||
| 120번째 줄: | 120번째 줄: | ||
$ if true; then :; else echo; fi | $ if true; then :; else echo; fi | ||
[http://unix.stackexchange.com/a/134025/31363] | [http://unix.stackexchange.com/a/134025/31363] | ||
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==Default {{c|.bashrc}}== | ==Default {{c|.bashrc}}== | ||
/etc/skel/.bashrc | /etc/skel/.bashrc | ||
[http://askubuntu.com/a/404428/400331] | [http://askubuntu.com/a/404428/400331] | ||
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==Tar the output on the fly== | ==Tar the output on the fly== | ||
| 133번째 줄: | 133번째 줄: | ||
tar -c something | tar -C somefolder -xv | tar -c something | tar -C somefolder -xv | ||
[https://superuser.com/a/345396/108174] | [https://superuser.com/a/345396/108174] | ||
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==Useful {{c|date}} format== | ==Useful {{c|date}} format== | ||
$ date +%D | $ date +%D | ||
| 143번째 줄: | 143번째 줄: | ||
$ date +%T | $ date +%T | ||
18:15:47 | 18:15:47 | ||
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==a== | ==a== | ||
2017년 4월 14일 (금) 19:08 판
목차
- 1 manual, refs
- 2 $SHLVL
- 3 Regular expression match test
- 4 getopt
- 5 stty
- 6 bash expansion : ranges
- 7 redirection
- 8 string : $''
- 9 or
- 10 extract tar archive from stdin
- 11 find out what is using TCP port 80
- 12 read from file or stdin
- 13 no op
- 14 Default .bashrc
- 15 Tar the output on the fly
- 16 Useful date format
- 17 a
manual, refs
- Mendel Cooper - Advanced Bash-Scripting Guide (aka. ABS) (한글판)
- Bash Reference Manual
- bash features
- BASH Programming - Introduction HOW-TO ★
- Bash Guide for Beginners
- Bash scripting Tutorial
$SHLVL
The variable tracks your shell nesting level
$ echo $SHLVL 1 $ bash $ echo $SHLVL 2 $ exit $ echo $SHLVL 1
http://stackoverflow.com/a/4511483/766330
Regular expression match test
Use double bracket and =~
if [[ $gg =~ ^....grid.*$ ]] ; then echo $gg; fi
getopt
long options
use getopt(not getopts) [2]
multiple arguments with one flag
깔끔한 방법이 없어보임. [3]
-o a1 -o a2 -o a3
이런식으로 계속 주는 수밖에 없는듯
default option getopt
$ getopt -s bash -o l:: -l list:: -- -ltest -l 'test' -- $ getopt -s bash -o l:: -l list:: -- --list foo --list -- 'foo' $ getopt -s bash -o l:: -l list:: -- --list=foo --list 'foo' --
::을 쓰면 되지만, optional argument를 명시할 때는 short option의 경우 option뒤에 바로 붙여야 하고 long option의 경우 =을 꼭 써주어야 한다. [4]
stty
터미널이 제정신이 아닌것 같다 싶으면 그냥
stty sane
이 외 다양한 옵션에 관해서는 링크참고
bash expansion : ranges
$ echo {d..h}
d e f g h
$ echo {d..Z}
d c b a _ ^ ] [ Z
For more information, refer wiki.bash-hackers.org.
redirection
### cp file1 file2와 같다 $ cat < file1 > file2
string : $''
$ # Single quotation in single qoute $ # http://stackoverflow.com/a/16605140/766330 $ echo \'sdlfkjsldf\' | sed $'s/\'//' sdlfkjsldf' $ # $'string' : this is special. $ # below line won't work. $ # echo \'sdlfkjsldf\' | sed 's/\'//‘
or
$ # 'or' $ if [ -z "$1" ] || [ -z "$2" ]; then > echo "Usage: `basename $0` rslt_file target_folder" > fi
extract tar archive from stdin
use - as the input file
cat largefile.tgz.aa largefile.tgz.ab | tar zxf -
find out what is using TCP port 80
# netstat -tulpn | grep :80
-p : You should be root
read from file or stdin
while read line
do
echo "$line"
done < "${1:-/dev/stdin}”
${1:-…} takes $1 if defined otherwise the file name of the standard input of the own process is used
no op
:
$ if true; then :; else echo; fi
Default .bashrc
/etc/skel/.bashrc
Tar the output on the fly
The same -f - option works for tarring as well.
tar -cf - something | tar -C somefolder -xvf -
GNU tar uses stdio by default:
tar -c something | tar -C somefolder -xv
Useful date format
$ date +%D 04/11/17 $ date +%F 2017-04-11 $ date +%R 18:15 $ date +%T 18:15:47