1. UNIX for Advanced & Expert Users

Hello, I need to insert a line (like a header) as the first line of a very huge file (about 3 ml rows). I am able to do it with sed, but redirecting the output and creating a new file takes quite some time. I was wondering if there was a more efficient way of doing it? Any help would be... (3 Replies)

2. Shell Programming and Scripting

Hello guys, Need to know how to insert a line at top of the file, without using temp files. Can we do it on the fly? Regards, Rishi (7 Replies)

3. UNIX for Advanced & Expert Users

hi..i wanted to know is there any way to take input from the user and copy that a particular line number in a particular file for eg . i wanted to create acl in squid at line number 2400 in squid.conf file so the user gives an input like acl inetblock src 192.168.0.0/255.255.0.0 so is there... (4 Replies)

4. Shell Programming and Scripting

Hello... I have a file which contain certain number of records. I want to generate another file from this file which will contain 1st line as a blank line & after every 5 lines one blank line will be inserted. How to achieve this through shell scripting? Thanks... (5 Replies)

5. Programming

how to insert a line of text that is next to the current line(file pointer pointing to) in the file ?? :wall: ex: suppose a file named 'Sample' has the following content in it. this is to give clear idea about the problem if file pointer is pointing to the first line then i want to... (3 Replies)

6. Shell Programming and Scripting

Hello, I am looking to automate a task - which is updating an existing access control instruction of a server and making sure that the attributes defined in the instruction is in sorted order. The instructions will be of a specific syntax. For example lets assume below listed is one of an... (6 Replies)

7. Shell Programming and Scripting

Hi all, I have a huge file(size more that 5GB). I want to do some manupulation with the records and write to another file. As the size of the file is huge and there is a space constraint in that directory, I want to delete that record from first file after writing it in to second file.... (3 Replies)

8. Shell Programming and Scripting

Hello. I have a config file (/etc/my_config_file) which may content : # # port for HTTP (descriptions, SOAP, media transfer) traffic port=8200 # network interfaces to serve, comma delimited network_interface=eth0 # set this to the directory you want scanned. # * if have multiple... (6 Replies)

9. Shell Programming and Scripting

I have a test file that I want to read and insert only certain lines into the the table based on a filter. 1. Rread the log file 12 Hours back Getdate() -12 Hours 2. Extract the following information on for lines that say "DUMP is complete" A. Date B. Database Name C.... (2 Replies)

10. UNIX for Beginners Questions & Answers

Hi All, I am using UNix Sun OS sun4u sparc SUNW,SPARC-Enterprise My intention is to insert a line of text after 13th line of every file inside a particular directory. While trying to do it for a single file , i am using sed sed '3 i this is the 4th line' filename sed: command garbled: 3... (5 Replies)