01-04-2011
Have you tried grep -A and grep -B?
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1. Shell Programming and Scripting
I have this files:
./frm/lf_mt1_cd.Ic_cell_template.attr
./die/addgen_tb_pumd.Ic_cell_template.attr
./min_m1_n.Ic_cell_template.attr
When I use:
awk -F\/ '{print NF}'
Would result to:
3
3
2
I would like to list the files with 3 fields on it. Any Suggestions? (1 Reply)
Discussion started by: jehrome_rando
1 Replies
2. Shell Programming and Scripting
Hi -
I am guessing this is fairly simple for someone .. but I can not quite figure it out. I need a sed command to print just parts of lines from a file.
e.g. filea.txt
4710451 : Success : MODIFY : cn=user1,dc=org,dc=uk
Message log started
Message log ended
4710452 : Success : MODIFY :... (7 Replies)
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3. UNIX for Advanced & Expert Users
The below line gives the perfect output when I mention the record number and file name as hardcoded.
awk 'NR==3{print}' samp2.txt
But when I pass the record num and file name as variable, it doesn't give any output.
row_num=3;file2=samp2.txt;awk 'NR==$row_num {print}' $file2
Can you... (2 Replies)
Discussion started by: siba.s.nayak
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4. Shell Programming and Scripting
Hey, I found a way to print the lines which is just before a regular expression, not including the expression.
sed -n '/regexp/{n;p;}' myfile
Now I'm looking for a way to print all lines, exept the regular expression and also the line before the same regular expression.
Use code tags. (1 Reply)
Discussion started by: Livio
1 Replies
5. Shell Programming and Scripting
Hello all,
I need to print all the lines before a specific string and print a custom message 2 lines after that.
So far I have managed to print everything up the string, inclusively, but I can't figure out how to print the 2 lines after that and the custom message.
My code thus far is:... (4 Replies)
Discussion started by: SEinT
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6. UNIX for Dummies Questions & Answers
I am running Ubuntu 11.10
I have the following files.
geo2503r05690585.html
geo2503r06020612.html
geo2503r06250641.html
geo2503r06490658.html
geo2503r06830686.html
geo2503r05860601.html
geo2503r06130624.html
geo2503r06420648.html
geo2503r06590682.html ... (4 Replies)
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7. Shell Programming and Scripting
Hi
I have a file like
# vi require.txt
1,BANK,Read blocks that cycle.
yellow
Read blocks.
2,ACCOUNT,Finished
Red
Finished .
3,LOAN, pipe
white
pipe
4,PROFIT,Resolve.
black
Resolve
Am using like
cat require.txt | grep -w ACCOUNTThe output I get is (8 Replies)
Discussion started by: Priya Amaresh
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8. UNIX for Dummies Questions & Answers
This could be a really dummy question.
I have a log text file.
What unix command to extract line from specific string to another specific string.
Is it something similar to?:
more +/"string" file_name
Thanks (4 Replies)
Discussion started by: aku
4 Replies
9. UNIX for Dummies Questions & Answers
Hi
I have a file which is tab-delimited. Now, I'd like to print the lines which have "chr6" string in both first and second columns. Could anybody help? (3 Replies)
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10. Shell Programming and Scripting
This is an extract from a large file. The lines that start with fc are ports on a fabric switch. In between each fc port there is information about the port.
fc2/12 is up
Port description is SEIEDISCOVER-3
Speed is 4 Gbps
fc2/13 is down (Administratively down)
fc2/14 is up
Port... (1 Reply)
Discussion started by: kieranfoley
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REGEXP(6) Games Manual REGEXP(6)
NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')'
e2: e3
| e2 REP
REP: '*' | '+' | '?'
e1: e2
| e1 e2
e0: e1
| e0 '|' e1
A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never
matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s,
the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
may appear unescaped.
A matches any character.
A matches the beginning of a line; matches the end of the line.
The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres-
sion.
SEE ALSO
awk(1), ed(1), sam(1), sed(1), regexp(2)
REGEXP(6)