Does anybody understand why this is not being interpreted as true.
Script:
#!/bin/bash
errored=`grep "errored" new_update_scripts.txt`
echo $errored = "errored"
if ; then
echo true
else
echo false
fi
Output:
$ UpdateScripts
errored = errored
false (7 Replies)
Hi,
I have a file like this
A Bob
A Sam
A John
B David
C Paul
C Sandra
If the consecutive field values in column one is same, then concatenate the corresponding strings.
So, I need an output like this,
A Bob_Sam_John
B David
C Paul_Sandra
I usually work with excel but... (3 Replies)
I have this code and I want to get the first two consecutive distances (obtained by calling GET_TH(IT, 'DIST', DIST) at index IT, the result stored in DIST) for which (ITFLG(IT) .NE. 1). L_FIRST get the first DIST for which ITFLG(IT) .NE. 1. Getting a bit confused on how to achieve this.
... (0 Replies)
Hi all
I am trying to scan a file that has 3 columns:
red blue 123351
red blue 848655
red blue 126354
red blue 023158
black white 654896
red blue 650884
I want an output that sums the rows that have matching columns 1 and 2 :wall:
red blue has 5 entries
black white has 1 entry
... (4 Replies)
Hi,
Here is my sample input
X 2 AAA
Y 3 BBB
Y 2 CCC
Z 4 DDD
In field 1, if the value of one line is same as that of next line, I want to concatenate the corresponding value of the second line in the third field with the value of the third field of first line. And I dont need the third... (2 Replies)
I would like to compare the values of 2nd column of consecutive lines of same file in such a way so that if the difference between first value and second value is more than 100 it should print complete line else ignore line.
Input File
==========
PDB 2500
RTDB 123
RTDB-EAGLE 122
VSCCP 2565... (4 Replies)
Hi,
I have a tab delimited text file where some lines have the string "NA" in the second column. For these lines, I want to replace NA with the value in the first column, the symbol underscore followed by the value in the fourth column. How do I go about doing that? Thanks!
Input:
1 ... (3 Replies)
Hello,
I have compiled a script but I have stucked at one point.
Each line contains two pcs of % value and what I want to do is to delete any line if both % values are zero.
data:
expected output:
ow3 should be deleted as both percentage value in related line are equal to zero.
... (2 Replies)
Discussion started by: baris35
2 Replies
LEARN ABOUT DEBIAN
cow-shell
cow-shell(1) cowdancer cow-shell(1)NAME
cow-shell - Start a copy-on-write session and invoke a shell.
SYNOPSIS
cow-shell [commandline]
DESCRIPTION
cow-shell Executes specified command with cowdancer or a shell if no command-line option is given.
Inside the cowdancer session, files under the current directory are protected in a way so that a write operation to an i-node which existed
at the point of running cow-shell is not modified.
Useful for managing hard-linked source-trees and scratch-filesystems.
EXAMPLES
cp -al cowdancer/ cowdancer.new && cd cowdancer.new && cow-shell
Create a hardlinked tree, and cd into the newly created tree. After invoking cow-shell inside that tree, a write operation against
a file that is hardlinked with the original tree will be copied to a new file before write.
cp -al cowdancer/ cowdancer.new && cd cowdancer.new && cow-shell debuild
Tries to run dpkg-buildpackage on the new tree, to avoid damage to the original tree.
Configure debuild to ignore .ilist files, through -i or -I option.
FILES
.ilist Generated dynamically in the current directory. The file contains the list of i-node numbers that should be protected from write
operation.
/usr/lib/cowdancer/libcowdancer.so
The shared library used internally that overrides some functions that potentially write to files. This library implements the COW
feature and is preloaded with LD_PRELOAD.
/bin/cp
Used for copying. Requires GNU option -a to be functional.
ENVIRONMENT
COWDANCER_ILISTFILE
The path to the current .ilist file.
COWDANCER_IGNORE
Used internally to work around infinite loops. It will be unset.
LD_PRELOAD
Utilized to preload libcowdancer.so
COWDANCER_DEBUG
Debugging option. Enables debug messages. cowdancer will give verbose debug messages in standard error output.
COWDANCER_SO
Debugging option. Specifies a different path for libcowdancer.so.
COWDANCER_REUSE=yes
Enables reuse of cowdancer .ilist file found for consecutive runs of cow-shell.
RETURN VALUE
The functions that are overridden with cowdancer will give an errno value of ENOMEM when there is a problem.
System isn't really out of memory, but this error code is chosen because this error is usually handled gracefully by applications.
RESTRICTIONS
Can only support directories that are scanned by cow-shell command.
The operation is not semantically correct when files are originally hardlinked, hardlinks are always broken.
Does not support anything when LD_PRELOAD trick does not work.
Does not work unless hardlinks are supported on the filesystem.
Not very user-friendly.
Leaves .ilist file around.
AUTHOR
Junichi Uekawa (dancer@debian.org)
Upstream page is available at http://www.netfort.gr.jp/~dancer/software/cowdancer.html
SEE ALSO
cowdancer-ilistcreate (1)
cowdancer 2006 Jan 25 cow-shell(1)