I have written the below shell script to copy the last lines of a file in a directory to append to a file in another directory
cd /opt/grinder/svn/IAVS/GrinderLogs/GrinderBaseLogs/Lg2Logs
GrinderLG1='rm101sys1lweb22'
GrinderLg2='rm101sys1lweb23'
fileCount=$(ls -l|wc -l)
echo $fileCount
for (( c=0; c<=$fileCount-2; c++ ))
do
Lines=$(more $GrinderLg2"-"$c"-data.log"|wc -l)
Lines1=`expr $Lines - 1`
`"tail -"$Lines1"f /opt/grinder/svn/IAVS/GrinderLogs/GrinderBaseLogs/Lg2Logs/"$GrinderLg2"-"$c"-data.log>>/opt/grinder/svn/IAVS/GrinderLogs/GrinderBaseLogs/"$GrinderLG1"-"$c"-data.log"`
#exec $command
done
When I am executing this script it says no such file or directory at tail command. Actually both the files exist. Please help.
`"tail -"$Lines1"f /opt/grinder/svn/IAVS/GrinderLogs/GrinderBaseLogs/Lg2Logs/"$GrinderLg2"-"$c"-data.log>>/opt/grinder/svn/IAVS/GrinderLogs/GrinderBaseLogs/"$GrinderLG1"-"$c"-data.log"`
change to
tail -"$Lines1"f /opt/grinder/svn/IAVS/GrinderLogs/GrinderBaseLogs/Lg2Logs/"$GrinderLg2"-"$c"-data.log>>/opt/grinder/svn/IAVS/GrinderLogs/GrinderBaseLogs/"$GrinderLG1"-"$c"-data.log
should work.
In my setup i have tested as below way
#!/bin/sh
`"tail -10f filename"`
give error filename not found
But
#!/bin/sh
tail -10f filename
This works fine.
Related
I have a directory mnt/d/LIVI.
Inside the directory, LIVI, I have sub-directories:
mnt/d/LIVI/ak
mnt/d/LIVI/ag
mnt/d/LIVI/few
mnt/d/LIVI/ww4
mnt/d/LIVI/ks5
I wanted to copy a file named tt.txt from mnt/d/LIVI/ak/tt.txt and paste to all the sub directories of LIVI, using Ubuntu terminal. How do i do it using a shell script file?
I tried the following one, but it didn't work.
I created a text file named mnt/d/LIVI/FOLDERS.txt, This listed all the sub directories names.
And saved a script file in mnt/d/LIVI directory. The following is the script
#!/bin/sh
# -*- coding: utf-8-unix -*-
ROOTDIR=$(dirname $0 | xargs readlink -f)
for SIMDIR in cat FOLDERS.txt | xargs readlink -f ; do
cp mnt/d/LIVI/ak/tt.txt $SIMDIR
done
#cd ..
date
You may try this bash script
#!/bin/bash
cd "${0%/*}" || exit
for dir in */; do
if [[ $dir != 'ak/' ]]; then
cp ak/tt.txt "$dir"
fi
done
The script must reside under the diectory mnt/d/LIVI
Don't read lines with for.
(If you really wanted to, the syntax for that would look like
for dir in $(cat FOLDERS.txt); do
...
but really, don't. The link above explains why in more detail.)
I don't see why you want to run readlink on the directories at all?
cd "$(dirname "$0")"
while read -r dir; do
cp ak/tt.txt "$dir"
done <FOLDERS.txt
Note also Correct Bash and shell script variable capitalization
I want to find bash script files under folders in Array.
But bash script files do not have a specified extension.
I wrote something like this:
for i in "${array[#]}"
do
# Here I will write the condition that the file is found in the folder $k
done
If your scripts have #!/bin/bash or #!/bin/sh in their first line (as they should), then you can use the file command to check if a file is a script or not.
For example, take this script:
#!/bin/bash
echo "I am a script!"
Output of file filename.sh will be filename.sh: Bourne-Again shell script, ASCII text executable, which is indicating it is a shell script. Note that the file command does not use the extension of the file to indicate its format, but uses the content of it.
If you don't have those lines at the beginning of your file, You can try to run every file (command: bash filename.ext) and the check if it was run successfully or not by checking the value of the variable ${?}. This is not a clean method but it sure can help if you have no other choices.
The file command determines a file type.
e.g
#!/bin/bash
arr=(~/*)
for i in "${arr[#]}"
do
type=`file -b $i | awk '{print $2}'`
if [[ $type = shell ]];then
echo $i is a shell script
fi
done
This is my small bash script code and i want to print the number of files created in the directory :
#! /bin/sh
home_dir=/home/var/foo
Count= ls /$home_dir|wc -l
echo -e "$Count files are existed in the directory $home_dir"
exit 0
My expected output is :
9 files are existed in the directory /home/var/foo
but i got the below output:
9
files are existed in the directory /home/var/foo
can you help what went wrong in my above code? Also please suggest if this is the correct way to print the number of files in the directory
This works for me:
Count=$(ls /$xml_dir|wc -l)
To print on the same line
echo -ne "$Count files are existed in the directory $home_dir"
Add argument n to the echo.
In my script, I am holding the location (path) of a file as a variable.
For example, fileA
An example of its contents are
fileA=/usr/anotherfolder/somefold/"filenamehere"
However, when i call a command on the file in the script such as:
cat $fileA
or
cat "$fileA"
I get an error saying the file or directory doesn't exist. If I echo $fileA to see what the output is, and then run a cat manually from the terminal, it works fine, don't know what is going wrong. Any help?
Some debug info:
fileA='/home/jacob/Desktop/CS35L/WORK/2/hw/test3/"new"'
echo '/home/jacob/Desktop/CS35L/WORK/2/hw/test3/"new"'
/home/jacob/Desktop/CS35L/WORK/2/hw/test3/"new"
'[' '!' -r '/home/jacob/Desktop/CS35L/WORK/2/hw/test3/"new"' ']'
For these particular lines
Check for readable file
echo $fileA
if [ ! -r "$fileA" ]
then
o=`expr $o + 1`
echo "$fileA not readable."
continue
fi
If file name is new(not "new"), then change
fileA='/home/jacob/Desktop/CS35L/WORK/2/hw/test3/"new"'
to
fileA=/home/jacob/Desktop/CS35L/WORK/2/hw/test3/new
I have a file "FileList.txt" with this text:
/home/myusername/file1.txt
~/file2.txt
${HOME}/file3.txt
All 3 files exist in my home directory. I want to process each file in the list from a bash script. Here is a simplified example:
LIST=`cat FileList.txt`
for file in $LIST
do
echo $file
ls $file
done
When I run the script, I get this output:
/home/myusername/file1.txt
/home/myusername/file1.txt
~/file2.txt
ls: ~/file2.txt: No such file or directory
${HOME}/file3.txt
ls: ${HOME}/file3.txt: No such file or directory
As you can see, file1.txt works fine. But the other 2 files do not work. I think it is because the "${HOME}" variable does not get resolved to "/home/myusername/". I have tried lots of things with no success, does anyone know how to fix this?
Thanks,
-Ben
Use eval:
while read file ; do
eval echo $file
eval ls $file
done < FileList.txt
From the bash manpage regarding the eval command:
The args are read and concatenated together into a single command. This command is
then read and executed by the shell, and its exit status is returned as the value of
eval. If there are no args, or only null arguments, eval returns 0.
you will hit "spaces problem" using the for loop with cat. Manipulate IFS, or use a while read loop instead
while read -r line; do eval ls "$line"; done < file
Change "ls $file" to "eval ls $file" to get the shell to do its expansion.