Good morning,
Novice scripter in Unix here, and I've run into and sed task I can't quite wrap my head around. I'm pulling my hair out fast enough as it is and thought I would go to the knowledge bank.
I have a sorted file that I'm trying to trim down by deleting any line whose first few... (2 Replies)
I am trying to print 1st, 2nd, 13th and 14th fields of a file of line numbers from 29 to 10029. I dont know how to put this in one code. Currently I am removing the selected lines by
awk 'NR==29,NR==10029' File1 > File2
and then doing
awk '{print $1, $2, $13, $14}' File2 > File3
Can... (3 Replies)
awk '!(/^$/||/--/||/selected/||/^ *$/){print "A." $1 " <> B." $1 " or"}' infile
my AWK out put is :
A.KZ <> B.KZ or
A.KZT <> B.KZT or
A.KZ_Z <> B.KZ_Z or
A.LH <> B.LH or
A.MAN<> B.MAN or
A.OBJEKT <> B.OBJECT or
A.PAK <> B.PAK ;
is there any way to controle AWK to not print the... (1 Reply)
I want to delete a line between selected lines using sed:
e.g. : Between "bus" to "pins", delete lines conaining "signal" word.
Input :
bus
direction
signal new
signal old
pins
signal ok
end
Desired Output:
bus
direction
pins
signal
end (4 Replies)
Simply, I have a directory of text files and I need to delete every line in every file containing a specific string. I want to write the modified files to an empty sub directory.
I can't seem to get the sed command to delete the lines containing the string, and not just the string, in other... (3 Replies)
hi Gurus,
I have a source file with more than 10 columns ( not fixed )
I want to delete all the lines on the following condition
1) where i have first column as "UPDATE PLAN ADD RATE SCHEDULE" and fourth column as null
awk '($1=="UPDATE PLAN ADD RATE SCHEDULE" && $4=="") {print $0}'... (5 Replies)
Dear all,
I would like to delete even lines starting with "N" together with their respective titles which are actually odd lines.
Below is the example of input file. I would like to remove line 8 and 12 together with its title line, i.e., line 7 and 11, respectively.... (2 Replies)
Shell : bash
OS : RHEL 6.8
I have a file like below.
$ cat pattern.txt
hello
txt1
txt2
txt3
some other text
txt4
I want to remove all lines in this file except the ones starting with txt . How can I do this ? (4 Replies)
I wish to search and delete all lines in /app/Jenkins/deploy.txt having this filename string /app/Jenkins/file2.mrt as entry:
I'm using : colon as delimiter in sed command as I'm dealing with file paths.
Below is the command I was expecting to work.
sed -i ":/app/Jenkins/file2.mrt:d"... (1 Reply)
Discussion started by: mohtashims
1 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