我有以下文件列表:
lab-1:/tmp/tmp.NMFaDO# ls
webserver.123.net.1970-01-01.csv webserver.123.net.2016-10-01.csv webserver.123.net.2017-10-01.csv
webserver.123.net.2015-11-01.csv webserver.123.net.2016-11-01.csv webserver.123.net.2017-11-01.csv
webserver.123.net.2015-12-01.csv webserver.123.net.2016-12-01.csv webserver.123.net.2017-12-01.csv
webserver.123.net.2016-01-01.csv webserver.123.net.2017-01-01.csv webserver.123.net.2018-01-01.csv
webserver.123.net.2016-02-01.csv webserver.123.net.2017-02-01.csv webserver.123.net.2018-02-01.csv
webserver.123.net.2016-03-01.csv webserver.123.net.2017-03-01.csv webserver.123.net.current.csv
webserver.123.net.2016-04-01.csv webserver.123.net.2017-04-01.csv webserver.123.net.db.done
webserver.123.net.2016-05-01.csv webserver.123.net.2017-05-01.csv webserver.123.net.records_to_delete.txt
webserver.123.net.2016-06-01.csv webserver.123.net.2017-06-01.csv sip2.ci2.lab.jwm2.net.2018-02-01.csv
webserver.123.net.2016-07-01.csv webserver.123.net.2017-07-01.csv sip2.ci2.lab.jwm2.net.db.done
webserver.123.net.2016-08-01.csv webserver.123.net.2017-08-01.csv sip2.ci2.lab.jwm2.net.records_to_delete.txt
webserver.123.net.2016-09-01.csv webserver.123.net.2017-09-01.csv
在 bash 脚本中,我需要循环遍历此列表并仅提取文件名的日期部分。我设法弄清楚如何从
包含使用以下命令的文件的文件夹内部执行此操作:
lab-1:/tmp/tmp.NMFaDO# ls webserver.123.net*.csv | sed 's/webserver.123.net.\(.*\)\.csv/\1/'
1970-01-01
2015-11-01
2015-12-01
2016-01-01
2016-02-01
2016-03-01
2016-04-01
2016-05-01
2016-06-01
2016-07-01
2016-08-01
2016-09-01
2016-10-01
2016-11-01
2016-12-01
2017-01-01
2017-02-01
2017-03-01
2017-04-01
2017-05-01
2017-06-01
2017-07-01
2017-08-01
2017-09-01
2017-10-01
2017-11-01
2017-12-01
2018-01-01
2018-02-01
current
但我似乎无法让逻辑在我的 bash 脚本中工作:
dir=/tmp/tmp.NMFaDO
server=webserver.123.net
for csvfile in $dir/$server.*.csv
do
echo $csvfile | sed 's/$dir\/$server.\(.*\)\.csv/\1/'
done
目前它正在打印名称的完整路径,如下所示:
/tmp/tmp.NMFaDO/webserver.123.net.1970-01-01.csv
/tmp/tmp.NMFaDO/webserver.123.net.2015-11-01.csv
ETC。
有人能告诉我 bash 脚本中缺少什么吗?谢谢。
答案1
使用这样的文件名格式,您可以删除扩展名,然后删除最后一个点之前的所有内容。
带参数扩展:
for f in ./webserver.123.*; do
d=${f%.csv} # remove trailing .csv
d=${d##*.} # remove all up to (now) last .
echo "filename: $f date: $d"
done
或使用 sed:
for f in ./webserver.123.*; do
d=$(echo "$f" | sed -e 's/\.csv$//' -e 's/.*\.//');
echo "filename: $f date: $d";
done
答案2
注意你使用的引号:所以
dir=/tmp/tmp.NMFaDO
server=webserver.123.net
for csvfile in $dir/$server.*.csv
do
echo "$csvfile" | sed "s|$dir/$server.\(.*\)\.csv|\1|"
done
“双引号”包含空格/元字符的每个文字以及每一个扩张:"$var"
,"$(command "$var")"
,"${array[@]}"
,"a & b"
。用于'single quotes'
代码或文字$'s: 'Costs $5 US'
,ssh host 'echo "$HOSTNAME"'
.看
http://mywiki.wooledge.org/Quotes
http://mywiki.wooledge.org/Arguments
http://wiki.bash-hackers.org/syntax/words