Im new to unix,I have search a lot of info but still don not how to make it in a bash
What i know is used this command ls -tr|xargs -i ksh -c "mv {} ../tmp/" to move file by file.
Now I need to make a script that sorts all of these files by system date and moves them into a directory, The first 1000 oldest files being to be moved.
Example files r like these
KPK.AWQ07102011.66.6708.01
KPK.AWQ07102011.68.6708.01
KPK.EER07102011.561.8312.13
KPK.WWS07102011.806.3287.13
-----------This is the script tat i hv been created-------
if [ ! -d /app/RAID/Source_Files/test/testfolder ] then
echo "test directory does not exist!"
mkdir /app/RAID/Source_Files/calvin/testfolder
echo "unused_file directory created!"
fi
echo "Moving xx oldest files to test directory"
ls -tr /app/RAID/Source_Files/test/*.Z|head -1000|xargs -i ksh -c "mv {} /app/RAID/Source_Files/test/testfolder/"
the problem of this script is
1) unix prompt a syntax erro 'if'
2) The move command is working but it create a new filename testfolder instead move to directory testfolder (testfolder alredy been created in this path)
anyone can gv me a hand ? thanks
Could this help?
mv `ls -tr|head -1000` ../tmp/
head -n takes the n first lines of the previous command (here the 1000 oldest files). The backticks allow for the result of ls and head commands to be used as arguments to mv.
Related
I am trying to find if files in a directory, output of ls, exists in a file. So I have a file called test.txt inside this file I have few filenames like, V1.txt,v2.txt, v3.txt.
Now when I do ls I find list of files in the directory, I want to search if any of these files are on my test.txt file.
Example:
Sounds like you got two tasks you want to do.
1) loop through directory listing
2) search text file for any of the names of files that were in the directory
Test Setup
echo "V1.txt" > file_list.txt
echo "V2.txt" >> file_list.txt
mkdir testdir
touch testdir/V1.txt
touch testdir/V2.txt
touch testdir/V3.txt
Code
#!/bin/bash
for f in `ls testdir`
do
if grep -q $f file_list.txt; then
echo "found $f"
else
echo "not found $f"
fi
done
In Unix, WHILE command, I am trying to read a file, which is in another directory. But somehow not working, not even throwing any error.
while read line
do
echo $line
done < /tmp/myfile.txt
The file is present in /tmp folder, has all the permissions.
It is not clear why your while loop is not working. Normally loops, if condition syntax are different for different shell. Hence at the beginning of a shell script file we always define the shell where exactly this script should run and that first line is start with a #. Now do the following and check that might help you.
create a file $vi test.sh
put the below line in it
#!/usr/bin/ksh
filename="/tmp/myfile.txt"
while [ 1 ]
do
read -r line
if [ ${line:-1} -eq 1 ]; then
break
else
echo $line
fi
done < "$filename"
or
#!/usr/bin/ksh
filename="/tmp/myfile.txt"
while read -r line
do
echo $line
done < "$filename"
save the file and set the permission like below
$chmod 777 test.sh
now run the file
$./test.sh
I am in root directory, i am creating a script that will take me from root > Home > Logs and inside logs delete 3 log files.
Script will check if they exist, if YES it will delete it.
I am facing some syntax problems if you could help.
Thanks
My code:
#!/bin/sh
cd Home/Log
if [ -e error1.log ]
then
rm error1
fi
if [ -e error2.log ]
then
rm error1
fi
if [ -e error3.log ]
then
rm error1
fi
when i execute the file in root using ./delete here is what is am getting as errors:
$ ./delete
: No such file or directoryme/Log
./delete: line 14: syntax error near unexpected token `fi'
I am in root directory
When writing a script, it's almost always better not to assume things like that. If you know where the files are and it's not important that they're somewhere relative to what happens to be your current working directory, just name them.
Here are three ways you could accomplish what you want safely.
#!/bin/sh
dir=/Home/Log
rm -f ${dir}/error1.log ${dir}/error2.log ${dir}/error2.log
or
#!/bin/sh
dir=/Home/Log
rm -f ${dir}/error{1,2,3}.log
or
#!/bin/sh
set -e
cd /Home/Log && rm -f error1.log error2.log error2.log
For anything nontrivial, set -e is your friend. In your example, nothing happens later in the script. What you don't want is to keep going thinking you've changed directories, but haven't, and wind up scribbling somewhere you didn't intend. Many have lost much that way.
I am trying to tail multiple files in a ksh. I have the following script:
test.sh
#!/bin/ksh
for file in "$#"
do
# show tails of each in background.
tail -f $file>out.txt
echo "\n"
done
It is only reading the first file argument I provide to the script. Not reading the other files as the argument to the script.
When I do this:
./test.sh /var/adm/messages /var/adm/logs
it is only reading the /var/adm/messages not the logs. Any ideas what I might be doing wrong
You should use double ">>" syntax to redirect the stream at the end of your output file.
A simple ">" redirection will write the stream at the beginning of the file and consequently it will remove the previous content.
So try :
#!/bin/ksh
for file in "$#"
do
# show tails of each in background.
tail -f $file >> out.txt & # Don't forget to add the last character
done
EDIT : If you want to use multi tail it's not installed by default. On Debian or Ubuntu you can use apt-get install multi tail.
I would like to my terminal current directory follows my VIM one.
Example:
In TERMINAL:
> pwd
=> /Users/rege
> vim
Then in VIM
:cd /Users/rege/project
<Ctrl-z>(for suspend)
In terminal
> pwd
=> /Users/rege/project
I`m using MacOS, zsh, tmux.
I need this because when Im trying to use tags in VIM, tags are check in project from my terminal directory not vim one.
So I need to change terminal current directory always when I change VIM current directory.
What kind of command do you issue in your shell after you suspend Vim? Isn't Vim's :!command enough?
With set autochdir, Vim's current directory follows you as you jump from file to file. With this setting, a simple :!ctags -R . will always create a tags file in the directory of the current file.
Another useful setting is set tags=./tags,tags;$HOME which tells Vim to look for a tags file in the directory of the current file, then in the "current directory" and up and up until it reaches your ~/. You might modify the endpoint to suit your needs. This allows you to use a tags at the root of your project while editing any file belonging to the project.
So, basically, you can go a long way without leaving Vim at all.
If you really need to go back to the shell to issue your commands, :shell (or :sh) launchs a new shell with Vim's current directory. When you are done, you only have to $ exit to go back to Vim:
$ pwd
/home/romainl
$ vim
:cd Projects
:sh
$ pwd
/home/romainl/Projects
$ exit
In bash or zsh and on Unix you can do this: current working directory of the process is represented in /proc/{PID}/cwd as a symlink to a real directory. Speaking about zsh the following code will do the job:
function precmd()
{
emulate -L zsh
(( $#jobstates == 1 )) || return
local -i PID=${${${(s.:.)${(v)jobstates[1]}}[3]}%\=*}
cd $(readlink /proc/$PID/cwd)
}
. Note: with this code you won’t be able to pernamently switch directories in terminal anymore, only in vim or for duration of one command (using cd other-dir && some command).
Note 2: I have no idea how to express this in bash. The straightforward way is to get PIDs of all children of the shell (using ps --ppid $$ -o CMD), filter out the ps process (it will be shown as a child as well), check that there is only one other child and use its PID like in the last line above. But I am pretty sure there is a better way using some shell builtins like I did with zsh’s $jobstates associative array. I also don’t remember what is the analogue of precmd in bash.
Another idea would be making vim save its current directory into some file when you do <C-z> and make shell read this in precmd:
" In .vimrc:
function s:CtrlZ()
call writefile([fnamemodify('.', ':p')], $CWDFILE, 'b')
return "\<C-z>"
endfunction
nnoremap <expr> <C-z> <SID>CtrlZ()
# In .zshrc
function vim()
{
local -x CWDFILE=~/.workdirs/$$
test -d $CWDFILE:h || mkdir $CWDFILE:h
vim $#
}
function precmd()
{
local CWDFILE=~/.workdirs/$$
test -e $CWDFILE && cd "$(cat $CWDFILE)"
}
. It should be easier to port above code to bash.
you can open a new terminal like this
:!xterm -e bash -c "cd %:p:h;bash" &
actually I write this in my .vimrc
nmap <F3> :!xterm -e bash -c "cd %:p:h;bash" &<CR> | :redraw!
For bash users coming by:
Vim: Save pwd at <c-z> (with map and getpwd()).
Bash: Before prompt command, goto directory indicated by vim with PROMPT_COMMAND.
.bashrc
PROMPT_COMMAND='read -r line 2>/dev/null </tmp/cd_vim'\
'&& > /tmp/cd_vim && cd ${line##\r};'$PROMPT_COMMAND
vimrc
function! s:CtrlZ() call writefile([getcwd(),''], '/tmp/cd_vim', 'b')
return "\<C-z>"
endfunction
nnoremap <expr> <C-z> <SID>CtrlZ()
This is ZyX answer edited for bash https://stackoverflow.com/a/12241861/2544873