sed

问题 I have a file which appends a binary file to a bash script (in this case an ISO). It ultimately gets pulled apart, executing the bash script to install the ISO. The bash script ends in a unique string; " DATA " and during its execution the script deletes everything above and including that line. It doesn't however remove the terminating new line which means the new file (which should just be the binary ISO data) begins with a newline, breaking the ISO. The regex deleting the data is as

问题 I have a file which appends a binary file to a bash script (in this case an ISO). It ultimately gets pulled apart, executing the bash script to install the ISO. The bash script ends in a unique string; " DATA " and during its execution the script deletes everything above and including that line. It doesn't however remove the terminating new line which means the new file (which should just be the binary ISO data) begins with a newline, breaking the ISO. The regex deleting the data is as

问题 Exact regex expression for floating point number is not working and it execute both integer and floating point also.It should not work if the input given does not have decimal point.Please help me #!/bin/bash echo "Enter version code" read versionName if ! [[ "$versionName" =~ ^[+-]?[0-9]+\.?[0-9]*$ ]]; then echo "Sorry decimal numbers only" echo "$versionName" else sudo sed 's/\(versionName[[:space:]]*\)"[0-9.]*"/\1"'"${versionName}"'"/' test.txt fi 回答1: Use this: ^[+-]?[0-9]+\.[0-9]+$ ^ no

问题 Exact regex expression for floating point number is not working and it execute both integer and floating point also.It should not work if the input given does not have decimal point.Please help me #!/bin/bash echo "Enter version code" read versionName if ! [[ "$versionName" =~ ^[+-]?[0-9]+\.?[0-9]*$ ]]; then echo "Sorry decimal numbers only" echo "$versionName" else sudo sed 's/\(versionName[[:space:]]*\)"[0-9.]*"/\1"'"${versionName}"'"/' test.txt fi 回答1: Use this: ^[+-]?[0-9]+\.[0-9]+$ ^ no

问题 I have a SQL dump file that contains text with html links like: <a href="http://blahblah.org/kb/getattachment.php?data=NHxUb3Bjb25fZGF0YS1kb3dubG9hZF9ob3d0by5wZGY=">attached file</a> I'd like to find, decode and replace the base64 part of the text in each of these links. I've been trying to use Python w/ regular expressions and base64 to do the job. However, my regex skills are not up to the task. I need to select any string that starts with 'getattachement.php?data=' and ends with '"' I then

问题 I am trying to replace each \r\n in a text file with <p/> . I have tried the following with no luck: sed 's#\r\n#<p/>#g' test.txt sed 's#\r\n#<p/>#g' test.txt sed 's#/\r/\n#<p/>#g' test.txt sed ':a;N;$!ba;s/\r\n/<p/>/g' test.txt Here is the text in text.txt https://www.pivotaltracker.com/story/\r\nhttps://www.pivotaltracker.com/story\r\n\r\nSome business text.\r\n\r\nSome business text. Task 123 is still a work in progress but we wanted it in develop to keep everything updated. 回答1: All of

问题 Can someone please tell me how does sed -n '1!p work ? Below is the full command which I am using to sort my pods in k8s based on nodes they are assigned. kubectl get pods -o wide --all-namespaces|sort -k8 -r| sed -n '1!p' The above command works perfectly and the sed part removes the first header line from the final output. I want to understand how does the sed part work and what's the significance of the parameters passed to sed ? 回答1: From info sed : -n : By default, 'sed' prints out the

问题 I have a file that looks as follows : >sp|rin-1 ghsfdhjkuesl OX=10116 GN=Cdh1 PE=1 SV=1|sp|P10287|ghsfdjdeosd gdhkhs OX=10090 GN=Cdh3 PE=1 SV=2 WRDTANWLEINPETGVISTRAEMDREDSEHVKNSTYTALIIATDDGSPIATGTGTLLLVLSDVNDNAPIPEPRNMQFCQRNPKPHVITILDPDLPP >sp|erin-1 ghsfdshkd OX=10116 GN=Cdh1 PE=1 SV=1|sp|P22223|CADH3_HUMAN Cadherin-3 OX=9606 GN=CDH3 PE=1 SV=2 ESYPTYTLVVQAADLQGEGLSTTAKAVITVKDINDNAPIFNPSTYLQCAASEPCRAVFREAEVTLEAGGAEQEPGQALGKVFMGCPGQEPALFSTD >sp|n-1 ghsfd OX=10116 GN=Cdh1 PE=1 SV=1|tr|F1LMI3

问题 I have a file that looks as follows : >sp|rin-1 ghsfdhjkuesl OX=10116 GN=Cdh1 PE=1 SV=1|sp|P10287|ghsfdjdeosd gdhkhs OX=10090 GN=Cdh3 PE=1 SV=2 WRDTANWLEINPETGVISTRAEMDREDSEHVKNSTYTALIIATDDGSPIATGTGTLLLVLSDVNDNAPIPEPRNMQFCQRNPKPHVITILDPDLPP >sp|erin-1 ghsfdshkd OX=10116 GN=Cdh1 PE=1 SV=1|sp|P22223|CADH3_HUMAN Cadherin-3 OX=9606 GN=CDH3 PE=1 SV=2 ESYPTYTLVVQAADLQGEGLSTTAKAVITVKDINDNAPIFNPSTYLQCAASEPCRAVFREAEVTLEAGGAEQEPGQALGKVFMGCPGQEPALFSTD >sp|n-1 ghsfd OX=10116 GN=Cdh1 PE=1 SV=1|tr|F1LMI3

问题 I have a file that looks as follows : >sp|rin-1 ghsfdhjkuesl OX=10116 GN=Cdh1 PE=1 SV=1|sp|P10287|ghsfdjdeosd gdhkhs OX=10090 GN=Cdh3 PE=1 SV=2 WRDTANWLEINPETGVISTRAEMDREDSEHVKNSTYTALIIATDDGSPIATGTGTLLLVLSDVNDNAPIPEPRNMQFCQRNPKPHVITILDPDLPP >sp|erin-1 ghsfdshkd OX=10116 GN=Cdh1 PE=1 SV=1|sp|P22223|CADH3_HUMAN Cadherin-3 OX=9606 GN=CDH3 PE=1 SV=2 ESYPTYTLVVQAADLQGEGLSTTAKAVITVKDINDNAPIFNPSTYLQCAASEPCRAVFREAEVTLEAGGAEQEPGQALGKVFMGCPGQEPALFSTD >sp|n-1 ghsfd OX=10116 GN=Cdh1 PE=1 SV=1|tr|F1LMI3