I've got a directory of CSV files.
I can do:
\ls /home/chris/data/
which works, producing a list:
"AAA.csv"
"AAAU.csv"
"AABA.csv"
etc.
However, when I try to assign it, so I can actually do something useful with it:
files: \ls /home/chris/data/
I'm unable to actually save the list.
What am I doing wrong?
You can use the system keyword, \ only works if it's the first character on a line:
files: system "ls /home/chris/data/"
Alternatively, key can be used, which I prefer as it's platform-independent with respect to path separators, and the shell command for listing files:
key `:/home/chris/data
Related
I'm using the command ls *Pattern*Date* Files.txt to get a list of files from FTP to my local text file.
I'm now required to get multiple patterned files (The Date and Pattern may come in different order). So when I try to add another line ls *Date*Pattern* Files.txt, this clears the FCCfiles.txt and I'm not able to get the first set of files.
Is there any command that can append the list of files rather than creating new files list?
You cannot append the listing to a file with ftp.
But you can merge multiple listings in PowerShell. I assume that you run ftp from PowerShell, based on your use of powershell tag.
In ftp script do:
ls *Pattern*Date* files1.txt
ls *Date*Pattern* files2.txt
And then in PowerShell do:
Get-Content files1.txt,files2.txt | Set-Content files.txt
(based on How do I concatenate two text files in PowerShell?)
This should work on my CentOS 6.6 but somehow the file name is not changed. What am I missing here?
rename -f 's/silly//' sillytest.zi
This should rename sillytest.zi to test.zi but the name is not changed. Of course I can use mv command but I want to apply to many files and patterns.
There are two different rename utilities commonly used on GNU/Linux systems.
util-linux version
On Red Hat-based systems (such as CentOS), rename is a compiled executable provided by the util-linux package. It’s a simple program with very simple usage (from the relevant man page):
rename from to file...
rename will rename the specified files by replacing the first occurrence of from in their name by to.
Newer versions also support a useful -v, --verbose option.
NB: If a file already exists whose name coincides with the new name of the file being renamed, then this rename command will silently (without warning) over-write the pre-existing file.
Example
Fix the extension of HTML files so that all .htm files have a four-letter .html suffix:
rename .htm .html *.htm
Example from question
To rename sillytest.zi to test.zi, replace silly with an empty string:
rename silly '' sillytest.zi
Perl version
On Debian-based systems ,rename is a Perl script which is much more capable
as you get the benefit of Perl’s rich set of regular expressions.
Its usage is (from its man page):
rename [ -v ] [ -n ] [ -f ] perlexpr [ files ]
rename renames the filenames supplied according to the rule specified as the first argument.
This rename command also includes a -v, --verbose option. Equally useful is its -n, --no-act which can be used as a dry-run to see which files would be renamed. Also, it won’t over-write pre-existing files unless the -f, --force option is used.
Example
Fix the extension of HTML files:
rename s/\.htm$/.html/ *.htm
I have been trying to do a recursive grep command on files in sub folders using grep in NTemacs and Cygwin. So far the "best" results have been using grep in eshell. When I use this:
grep "t" -r *
I get a list of all file names containing the letter t, in all sub folders one layer down but notthing else. In Cygwin i get nothing. I'm working on a directroy that is not in the Cygwin install. Don't know if that mather or not.
What I want is to match the content of a more complex string in all files (and not just the file names, but the content). And in all sub directories.
I would like to use eshell from emacs but I'm open to suggestions, apart form using LINUX. This is a work PC and I don't want to do all the setup of a LINUX install.
i just wrote a very similar answer to another question, but i suspect it's the same root problem:
my first thought is that your files have windows line endings (CRLF) as opposed to unix/linux line endings (LF), and that is messing with grep's ability to parse the file. try running this:
dos2unix filename
on each file you need to search then try your grep statement again.
if you need to convert many files across several directories, i suggest using dos2unix with the -exec action of find:
find . -exec dos2unix {} \;
(add whatever other options you need to find before running that, of course)
My colleague has created an JAVA_HOME variable somewhere but he could not remember.
I have check /etc/profile, /etc/bashrc, /root/.bash_profile, /root/.bashrc. All these files does not have a line to set JAVA_HOME, but it still keep coming back with old values.
So, is there a way to find out where is it coming from?
Here's one crude but effective way:
cd /
grep -r "JAVA_HOME" .
This will recursively search all subdirectories under the starting point (the UNIX root directory, in this example) for any file containing the string 'JAVA_HOME'.
You can use grep -r --include="*.ext" "JAVA_HOME" . if you want to restrict your searches to files having the extension .ext.
I have a bunch of text files which have both strings and numbers in it, but the string are just in the first few rows.
I'm trying to write a script which go in to my folder search all the file in the folder and delete the text from the files and write the rest as it is in the new text file.
Does anybody know how?
I don't think this is a good use of MATLAB.
I think you'd be better off scripting this in Python or shell. Here is one way you could do it with tr in shell if you're on *nix or mac and if your files are all in the same directory and all have the file extension .txt:
#!/bin/sh
for i in `ls *.txt`
do
cat $i | tr -d "[:alpha:]" > $i.tr.txt
done
To run. save the code above as a file, make it executable (chmod a+x filename), and run it in the directory with your text files.
If the number of string lines is always the same, you can use textread() with 'headerlines' option to skip over those string lines, then write the entire text buffer out.