我在根目录中有几个子目录.一次我想给chmod 777这些目录授予权限.
我个人知道我们可以给予,chmod -r 777 abcd但我想允许一次我需要的那些目录.
示例:
XYZ -- Parent Directory
ABCD EGF GHY JHF OIEDF -- These are sub directories.
now i want to give chmod 777 to ABCD EGF GHY . at a time to all these directories.
提前致谢.
我想将*.csv.gz格式的文件解压缩为.csv格式.
当我试图与这些命令$ gzip -d file.gz和$ gzip -f file.gz,它显示像
gzip: IQ.gz: No such file or directory
gzip: Envoy.gz: No such file or directory
gzip: compressed data not read from a terminal. Use -f to force decompression.
For help, type: gzip -h
请帮我解释如何解压缩.
提前致谢.
我有许多带制表符分隔的.csv文件,现在我想更改分隔符.当我使用下面的脚本时,它不会更改文件.所以请帮我写脚本.
file_mask=$1
from_delim=$2
to_delim=$3
for i in `ls $file_mask*`
do
sed -i 's|$from_delim|$to_delim|g' $i
done
我想将日期格式更改为2013-08-01我文件中的当前格式8/10/13,该文件包含数千条记录,我也有大量文件.
请在此建议,如何转换.
+abcd 2013^8/1/13^Bing^Milwaukee_abcd High Volume^Abcd^izvd4PZo^^Wisconsin^Chicago^http://ad.abcd.net/clk;256581924;80198650;s;u=ms&sv1=izvd4PZo&sv2={AdId}&sv3=3392oik17016&sv4={keyword}&sv5={matchtype};?http://www.chicago.buyacar.com/specials?srchid=|Milwaukee_cdhdf+High+Volume|_%2Berhefn_2013^Broad^5^1^1.47^
+sjhrejk models^8/1/13^Bing^Milwaukee_shdh High Volume^fhekj^9NT23JfC^^Wisconsin^Chicago^http://ad.fhd.net/clk;256581924;80198650;s;u=ms&sv1=9NT23JfC&sv2={AdId}&sv3=3392oik17016&sv4={keyword}&sv5={matchtype};?http://www.chicago.buyhfrkeu.com/specials?srchid=|Milwaukee_djkjfhkd+High+Volume|_%2Bdhk_models^Broad^14^4^5.58^
buy a +jkdsh^8/1/13^Bing^Milwaukee_kjfheu High Volume^jkdfhdj^T0ncFpv4^^Wisconsin^Chicago^http://ad.jfd.net/clk;256581924;80198650;s;u=ms&sv1=T0ncFpv4&sv2={AdId}&sv3=3392oik17016&sv4={keyword}&sv5={matchtype};?http://www.chicago.buyfjj.com/specials?srchid=|Milwaukee_jefrhjd+High+Volume|buy_a_%2Bfhd^Broad^15^1^2.44^
谢谢 !!
我想通过使用正则表达式获取字符串的最后8个字符.这里有些例子:
psG8FKzmVz -> G8FKzmVz
es5xd2bC47 -> 5xd2bC47
ese2SapMT3 -> e2SapMT3
请帮忙.