Shell operation file commands: delete the last column, delete the first line, diff, etc.

Source: Internet
Author: User
Tags hadoop fs
Shell commands: delete the last column, delete the first line, diff, and so on. delete the first line of the file: sed & amp; #39; 1d & amp; #39; filename: awk & amp; #39; {print $ NF} & amp; #39; two methods for comparing filename files: 1) comm-3 -- no... shell commands: delete the last column, delete the first line, diff, and delete the first line of the file: sed '1D 'filename delete the last column of the file: awk '{print $ NF}' two methods for comparing filename files: 1) comm-3 -- nocheck-order file1 file22) grep-v-f file1 file2: the output file2 contains rows not included in file1, and of course diff file1 file2 posts a shell script written yesterday ~ #! /Bin/bashdate_time = 'date + '% H _ % M _ % s' 'Yesterday = 'date-d "-1 day" +' % Y _ % m _ % d ''Today = 'date + '% Y _ % m _ % d' 'date _ day_time = 'date +' % Y _ % m _ % d _ % H _ % M _ % s' mkdir/home/spamdetect/changxiaojia/workspace/finance/logs/same_similiar_log/$ today # begin to get input files which haven'tbeen deal withtoday_input =/home/ crawler/petabyte/crawler LLOG/news_data/$ todayyesterday_input =/home/crawler/petabyte/crawler LLOG/news_data/$ yesterday/opt/hadoop/program/bin/hadoop fs-ls $ yesterday_input/ >/home/spamdetect/changxiaojia/workspace/finance/same_similar_news_mining/mid_files/all_get/opt/hadoop/program/bin/hadoop fs-ls $ today_input/>/home/spamdetect/ changxiaojia/workspace/finance/Workshop/mid_files/all_get sed '1D '/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/all_get>/home/spamdetect/changxiaojia/workspace /finance/users/mid_files/invalid awk '{print $ NF}'/home/spamdetect/changxiaojia/workspace/finance/same_similar_news_mining/mid_files/Documents>/home/spamdetect/changxiaojia/ workspace/finance/Workshop/mid_files/all_input # comm-3 -- nocheck-order/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/all_input/home/spamdetect/changxiaojia/ workspace/finance/Workshop/mid_files/input_done>/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/today_diff grep-v-f/home/spamdetect/changxiaojia/workspace/ finance/Workshop/mid_files/input_done/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/all_input>/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files awk '{print $ NF}'/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/today_diff>/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/ export mv/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/all_input/home/spamdetect/changxiaojia/workspace/finance/Workshop/mid_files/input_done # begin to compute finished = "" while read linedo inputfile1 = $ inputfile1, $ {line} done

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.