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)
guys i need some help in writing a shell script, what i am trying to write is a shell script that can delete generated trace files my software usually generated everyday, i will give an example to make it easy to understand
root@cms-db # pwd
/pcard17/trace
root@cms-db # ls -l HSM_VERIF.TRC*... (4 Replies)
Input:
a
b
b
c
d
d
I need:
a
c
I know how to get this (the lines that have duplicates) :
b
d
sort file | uniq -d
But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem. (3 Replies)
hi :)
I need to delete partial duplicate lines
I have this in a file
sihp8027,/opt/cf20,1980182
sihp8027,/opt/oracle/10gRelIIcd,155200016
sihp8027,/opt/oracle/10gRelIIcd,155200176
sihp8027,/var/opt/ERP,10376312
and need to leave it like this:
sihp8027,/opt/cf20,1980182... (2 Replies)
Hello, this is probably a simple request but I've been toying with it for a while.
I have a large list of devices and commands that were run with a script, now I have lines such as:
a-router-hostname-C#show ver
I want to print everything up to (and excluding) the # and everything after it... (3 Replies)
Hi All,
I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space.
I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Hey guys,
I have a file with an ID which I'm using to grep out the original record from another file. Problem is I have special characters in the original file, and grep is returning only a partial record. How can I get around this?
Appreciate your help!
Pete (3 Replies)
hey guys,
I tried searching but most 'search and replace' questions are related to one liners.
Say I have a file to be replaced that has the following:
$ cat testing.txt
TESTING
AAA
BBB
CCC
DDD
EEE
FFF
GGG
HHH
ENDTESTING
This is the input file: (3 Replies)
Hello,
I'm trying to figure out how to use sed or awk to delete single lines in a file. By single, I mean lines that are not touching any other lines (just one line with white space above and below).
Example:
one
two
three
four
five
six
seven
eight
I want it to look like: (6 Replies)
Background: I use a TV tuner card to capture OTA video files (.mpeg) and then my Plex Media Server automatically optimizes the files (transcodes for better playback) and places them in a new directory. I have another Plex Library pointing to the new location for the optimized .mp4 files. This... (2 Replies)
Discussion started by: shaky
2 Replies
LEARN ABOUT V7
test
TEST(1) General Commands Manual TEST(1)NAME
test - condition command
SYNOPSIS
test expr
DESCRIPTION
test evaluates the expression expr, and if its value is true then returns zero exit status; otherwise, a non zero exit status is returned.
test returns a non zero exit if there are no arguments.
The following primitives are used to construct expr.
-r file true if the file exists and is readable.
-w file true if the file exists and is writable.
-f file true if the file exists and is not a directory.
-d file true if the file exists and is a directory.
-s file true if the file exists and has a size greater than zero.
-t [ fildes ]
true if the open file whose file descriptor number is fildes (1 by default) is associated with a terminal device.
-z s1 true if the length of string s1 is zero.
-n s1 true if the length of the string s1 is nonzero.
s1 = s2 true if the strings s1 and s2 are equal.
s1 != s2 true if the strings s1 and s2 are not equal.
s1 true if s1 is not the null string.
n1 -eq n2
true if the integers n1 and n2 are algebraically equal. Any of the comparisons -ne, -gt, -ge, -lt, or -le may be used in place of
-eq.
These primaries may be combined with the following operators:
! unary negation operator
-a binary and operator
-o binary or operator
( expr )
parentheses for grouping.
-a has higher precedence than -o. Notice that all the operators and flags are separate arguments to test. Notice also that parentheses
are meaningful to the Shell and must be escaped.
SEE ALSO sh(1), find(1)TEST(1)