There are 10 problems in this part of the assignment.
Create a text file that contains a set of sed commands that perform the following actions. The files to be edited will be found in '/home/hopper/berezin/Data'. Your command file look something like:
#!/bin/bash
dir=/home/hopper/berezin/Data
psef=/home/hopper/berezin/Data/psef
passwd=/home/hopper/berezin/Data/passwd
etcList=/home/hopper/berezin/Data/etcList
etcSlist=/home/hopper/berezin/Data/etcSlist
# problem 01 - change the first occurrence of a to b
sed 's/a/b/' $passwd > sout.01
# problem 02 - change 2nd occurrence of x to y
sed 's/x/y/2' $passwd > sout.02
... etc
where sout has the problem number appended to it for each problem.
Each problem should include one or more comment lines explaining what you are doing.
You can change the contents of the data variable if you wish to run the sed commands on your own data set. But set it back before handing in the assignment. You can test the results of your 1st 7 solutons by using my data set and using diff to compare the souts files generated by solutions which can be found in '/home/hopper/Data/Sed'.
Create a function, similar to the one outlined in the grep assignment, that invokes diff and compares my answers to yours.
function sdiffit () {
'diff sout.$1 /home/hopper/berezin/Data/Sed/sout.$1
}
Unless stated otherwise, when a string is generically described as a word, treat a word as alpha, numeric, and underscore. If specific word given, treat as literal unless otherwise specified. If it says find the word dog, look for lower case "dog" unless the problem indicates otherwise.
Keep in mind, the passwd file uses a : as a field delimiter.
If you spot differences between your solutions and mine, and you think yours is rigt, check with me.
Send me your solution, I'll check it.
I may also check the data sets, my solution, and the interpretation of the problem.
Write a complete sed statement that edits the specified file. Different problems use different data files. Use the appropriate variable to reference the appropriate file. You may use multiple -e options. But unless specified, do not use any other sed options.
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sout.01 Substitute the user Id, root at the beginning of the line in the psef file with Master.
________________________________________
sout.02 In the passwd file, substitute the portion of the home directory field that that says /home/hopper with /system/tron. Do this without using the backslash.
________________________________________
sout.03 In the passwd file, locate users who are daemons. This is usually signifed by the user Id ending with a d, such as printd, sshd, etc.
Once that line has been identified, append :daemon to the end of the line.
So :
sshd:x:114:65534::/var/run/sshd:/usr/sbin/nologin Will look like :
sshd:x:114:65534::/var/run/sshd:/usr/sbin/nologin:daemon
Remember : separate fields in the passord file, so using square brackets and the not, [^:], is useful.
________________________________________
sout.04 Copy the user Id, the 1st word/column of the line to the end of the line preceeded by a space, :, and space. Use psef
So :
z1763923 10584 10583 0 09:39 pts/24 00:00:00 -bash
Will look like :
z1763923 10584 10583 0 09:39 pts/24 00:00:00 -bash : z1763923
Check out \(\) and &. Parentheses are numbered from the left and they may be embedded. \(\(...\)....\) is legal.
Hi,
I, based on my 5 years experience as a software engineer knowledgeable with unix and linux administration expert on commandline application, can handle this task pretty well. Let me know the best of your time so we can discuss and we can move forward to the next step.
Thanks,
Joseph C Ocero
November 5, 2015
16:00 IST
Hello,
Does the job require logging in to your server for viewing task list/data?
Am not aware of hourly job policies.
If on ly 10 problems: should be a short task
Hi there,
we are group of professionals with extensive experience in variety of skills including linux and shell scripting.
Though you have given pretty detailed description of what you want, we would like to work closely with you to understand your requirement fully and will deliver fully tested script exactly as per your expectation.
We will provide you initial draft and you can test it at your end. If you find any issues or have any feedback we would work on that and will give you final delivery of script.
We are just starting to work on freelance and are eager to work with you..
Hoping to hear back from you soon!!