Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

awk statement to match all lines starting with "#"

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting awk statement to match all lines starting with "#"
# 1  
Old 10-19-2009
awk statement to match all lines starting with "#"
Looking for awk statement that will match all lines starting with "# "

Code:
if ( $1 == \^"#" )

Input file:

# of the server. If you would like to set these, please take out the
# pound (#) sign in front of one or all severities and set it equal to
# severity desired. For example, FATAL=3
#
#FATAL=2
#CRITICAL=3
#WARNING=4
# 2  
Old 10-19-2009
Hi.

Code:
awk '/^#/ { .... }' file

To use regular expression matches in, for example, and if-statement, use ~ instead of ==

Code:
if ( $1 ~ /^#/ ) ...

Grep is simpler if you don't want to do anything with what you find:
Code:
grep ^# input_file

# 3  
Old 10-19-2009
scottn, works like a charm, thank you very much. That put the finishing touch to my awk script.

Code:
{
if (sub(/DISCOVERY=ON/, "DISCOVERY=OFF"))
print $0
if ( $1 ~ /^#/ ) {
        print $0 }
if ( NF == 4 ){
    if ( system("test -d " $4) ) {
         }
    else {
        print "1        0       0       "$4 "\n" }
}
}

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Search file containing ps results for a match "my.cnf" and then for a second match . "ok:" and

I need to find two matches in the output from ps. I am searching with ps -ef |grep mysql for: my.cnf /bin/sh /usr/bin/mysqld_safe --defaults-file=/data/mysql/master/agis_core/etc/my.cnf after this match I want to search back and match the hostname which is x number of lines back, above the... (2 Replies)
Discussion started by: bash_in_my_head
2 Replies

2. UNIX for Advanced & Expert Users

AIX - io info get from "libperfstat" not match "iostat"

Hi, everyone. I need to write a program to get io info based on libperfstat. But the "write time" of a disk is just half of the value get from iostat. I'm confused and can't explain. Help please. How I calculate "write service time per sec": In iostat: write service... (0 Replies)
Discussion started by: jackliang
0 Replies

3. Shell Programming and Scripting

Find lines with "A" then change "E" to "X" same line

I have a bunch of random character lines like ABCEDFG. I want to find all lines with "A" and then change any "E" to "X" in the same line. ALL lines with "A" will have an "X" somewhere in it. I have tried sed awk and vi editor. I get close, not quite there. I know someone has already solved this... (10 Replies)
Discussion started by: nightwatchrenba
10 Replies

4. Shell Programming and Scripting

how to use "cut" or "awk" or "sed" to remove a string

logs: "/home/abc/public_html/index.php" "/home/abc/public_html/index.php" "/home/xyz/public_html/index.php" "/home/xyz/public_html/index.php" "/home/xyz/public_html/index.php" how to use "cut" or "awk" or "sed" to get the following result: abc abc xyz xyz xyz (8 Replies)
Discussion started by: timmywong
8 Replies

5. Shell Programming and Scripting

Awk find in columns with "if then" statement and print results

I have a file1.txt file1.txt F-120009210","Felix","U-M-F-F-F-","white","yes","no","U-M-F-F-F-","Bristol","RI","true" F-120009213","Fluffy","U-F-","white","yes","no","M-F-","Warwick","RI","true" U-120009217","Lity","U-M-","grey","yes","yes","","Fall River","MA","true"... (4 Replies)
Discussion started by: charles33
4 Replies

6. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

7. Shell Programming and Scripting

Unix commands delete all files starting with "X" except "X" itself. HELP!!!!?

im a new student in programming and im stuck on this question so please please HELP ME. thanks. the question is this: enter a command to delete all files that have filenames starting with labtest, except labtest itself (delete all files startign with 'labtest' followed by one or more... (2 Replies)
Discussion started by: soccerball
2 Replies

8. Shell Programming and Scripting

cat $como_file | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g'

hi All, cat file_name | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g' Can this be done by using sed or awk alone (4 Replies)
Discussion started by: harshakusam
4 Replies

9. Shell Programming and Scripting

awk array starting with "ord"

I was writing a awk function and had a error I was wondering about. It revolves around a Multidimensional array starting with ord example: if ( _e == 5 ) { lmrb=$5 ; lmtb=$6 ; larb=$7 ; latb=$8 } ... (2 Replies)
Discussion started by: timj123
2 Replies

10. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies
Login or Register to Ask a Question