Id like to delete a line from a file using (preferably a single line unix command) if it contains a certain string pattern.
If line contains "abcdef" then delete that line.
Help greatly appreciated. (7 Replies)
Hi,
I am having file which contains around 15 columns, i need to fetch column 3,12,14 based on the condition that column 3 starts with 40464
this is the sample data
how to achieve that (3 Replies)
Hello,
Let's assume I have 100 files FILE_${m} (0<m<101). Each of them contains 100 lines and 10 columns.
I'd like to get in a file called "result" the average value of column 3, ONLY between lines 11 and 17, in order to plot that average as a function of the parameter m.
So far I can compute... (6 Replies)
hello all,
I wonder if anybody might be able to help with this.
I have file 1 and file2.
Both files may contain thousands of lines that have variable contents.
file1
234GH
5234BTW
89er
678tfg
234
234YT
tfg456
wert
78gt
gh23444 (7 Replies)
Hi Folks -
I'm quite new to awk and didn't come across such issues before. The problem statement is that, I've a file with duplicate records in 3rd and 4th fields. The sample is as below:
aaaaaa|a12|45|56
abbbbaaa|a12|45|56
bbaabb|b1|51|45
bbbbbabbb|b2|51|45
aaabbbaaaa|a11|45|56
... (3 Replies)
if a variable has part of awk syntax stored in it. for eg: x=if($1>100)
can we substitute this variable in an awk statement.
based on above requirement can we execute something like:
awk '{x print $1}' infile (5 Replies)
I have test.xml XML file like
<Report account="123456" start_time="2014-09-08T00:00:00+00:00" end_time="2014-09-10T23:59:59+00:00" user="Dollar Tree" limit="1000000" more_sessions="some text ">
<Session ......rest of xml...............
I need output like
<Report>
<Session ......rest of... (3 Replies)
Trying to combine strings that are a partial match to another in $1 (usually below it). If a match is found than the $2 value is added to the $2 value of the match and the $3 value is added to the $3 value of the match. I am not sure how to do this and need some expert help. Thank you :).
file
... (2 Replies)
Trying to get the unique count of the below input, but if the text in beginning of $5 is a partial match to another line in the file then it is not unique.
awk
awk '!seen++ {n++} END {print n}' input
7 input
chr1 159174749 159174770 chr1:159174749-159174770 ACKR1
chr1 ... (2 Replies)
In the awk below I am trying to cp and paste each matching line in f2 to $3 in f1 if $2 of f1 is in the line in f2 somewhere. There will always be a match (usually more then 1) and my actual data is much larger (several hundreds of lines) in both f1 and f2. When the line in f2 is pasted to $3 in... (4 Replies)
Discussion started by: cmccabe
4 Replies
LEARN ABOUT FREEBSD
ddb
DDB(8) BSD System Manager's Manual DDB(8)NAME
ddb -- configure DDB kernel debugger properties
SYNOPSIS
ddb capture [-M -core] [-N -system] print
ddb capture [-M -core] [-N -system] status
ddb script scriptname
ddb script scriptname=script
ddb scripts
ddb unscript scriptname
ddb pathname
DESCRIPTION
The ddb utility configures certain aspects of the ddb(4) kernel debugger from user space that are not configured at compile-time or easily
via sysctl(8) MIB entries.
To ease configuration, commands can be put in a file which is processed using ddb as shown in the last synopsis line. An absolute pathname
must be used. The file will be read line by line and applied as arguments to the ddb utility. Whitespace at the beginning of lines will be
ignored as will lines where the first non-whitespace character is '#'.
OUTPUT CAPTURE
The ddb utility can be used to extract the contents of the ddb(4) output capture buffer of the current live kernel, or from the crash dump of
a kernel on disk. The following debugger commands are available from the command line:
capture [-M core] [-N system] print
Print the current contents of the ddb(4) output capture buffer.
capture [-M core] [-N system] status
Print the current status of the ddb(4) output capture buffer.
SCRIPTING
The ddb utility can be used to configure aspects of ddb(4) scripting from user space; scripting support is described in more detail in
ddb(4). Each of the debugger commands is available from the command line:
script scriptname
Print the script named scriptname.
script scriptname=script
Define a script named scriptname. As many scripts contain characters interpreted in special ways by the shell, it is advisable to
enclose script in quotes.
scripts
List currently defined scripts.
unscript scriptname
Delete the script named scriptname.
EXIT STATUS
The ddb utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The following example defines a script that will execute when the kernel debugger is entered as a result of a break signal:
ddb script kdb.enter.break="show pcpu; bt"
The following example will delete the script:
ddb unscript kdb.enter.break
For further examples, see the ddb(4) and textdump(4) manual pages.
SEE ALSO ddb(4), textdump(4), sysctl(8)HISTORY
The ddb utility first appeared in FreeBSD 7.1.
AUTHORS
Robert N M Watson
BUGS
Ideally, ddb would not exist, as all pertinent aspects of ddb(4) could be configured directly via sysctl(8).
BSD December 24, 2008 BSD