1. Shell Programming and Scripting

Ez all! I have a question how to decrypt text uses letter frequency analysis. I have code which count the letters, but what i need to do after that. Can anybody help me to write a code. VERY NEEDED! My code now: #!/usr/bin/awk -f BEGIN { FS="" } { for (i=1; i <= NF; i++) { if ($i... (4 Replies)

2. UNIX for Advanced & Expert Users

hello experts, i am trying to replace a line in a 100+mb text file. the structure is similar to the passwd file, id:value1:value2 and so on. using the sed command sed -i 's/\(123\):\(\{1,\}\):/\1:bar:/' data.txt works nicely, the line "123:foo:" is replaced by "123:bar:". however, it takes... (7 Replies)

3. UNIX for Advanced & Expert Users

I'm trying to find a way to show large page sizes (page size in K) from multiple web server log files. Essentially I want to show only rows from a file where a specific column is larger than some value. Has anyone ever done this type of log analysis? If so, a snippet of code would be very... (2 Replies)

4. Shell Programming and Scripting

I'm using sed to do find and replace. But since the file is huge and i have more than 1000 files to be searched, the script is taking a lot of time. Can somebody help me with a better sed command. Below is the details. Input: 1 1 2 3 3 4 5 5 Here I know the file is sorted. ... (4 Replies)

5. Linux

Hi Routing tables in a typical linux kernel are implemented using hash data structures. So if the hash table is forced to behave more like a linked list(i.e create chaining) the purpose of using hash is defeated and time complexity increases. I want to try to assess the performance deterioration... (0 Replies)

6. Shell Programming and Scripting

Hello does anyone know of an awk that will extract log file entries between a specific date and time range, eg: awk '/15\/Dec\/2010:16:10:00/, /15\/Dec\/2010:16:15:00/' access_log but one that works? Or a free command line log file analysis tool/script? I'd like to be able to view... (2 Replies)

7. Shell Programming and Scripting

I would like to write a shell script that calculated the time difference bettween the log entries. If the time difference is higher as 200 sec. print the complette lines out. My Problem is, i am unable to jump in the next line and calculate the time difference. Thank you for your Help. ... (5 Replies)

8. Red Hat

Dear Guru, IHAC who complaint that his CentOS is getting performance issue. I have to help him out of there. Could you please tell me which tools is better to gathering the whole system performance data? -- CPU/Memory/IO(disk & Network)/swap I would like the tools could be... (6 Replies)