All,
I want to combine multiple files in one file.
Something like what we do on the commad line as follows ->
cat file1 file2 file3 > Main_File.
Can something like this be done in a perl script very efficiently?
Thanks,
Rahul. (1 Reply)
Situation:
Our system currently executes a job (COBOL Program) that generates an interface file to be sent to one of our vendors. Because this system processes information for over 100,000 employees/retirees (and growing), we'd like to multi-thread the job into processing-groups in order to... (4 Replies)
I've been trying to find information in regard to creating a script that will generate HTML files. I currently have a series of files that contain code I need to surround with a <textarea> tag for easy viewing. I have about a thousand files that contain code, one file that contains the HTML code up... (10 Replies)
I'm trying to combine colums from multiple file to a single file but having some issues, appreciate your help.
The filenames are the same except for the extension,
path1.m0
---------
a b c
d e f
g h i
path1.m1
---------
m n o
p q r
s t u
File names are path1.m
The... (3 Replies)
Hello All,
I have several column files like this
$cat a_b_s1.xls
1wert
2tg
3asd
4asdf
5asdf
$cat c_d_s2.xls
1wert
2tg
3asd
4asdf
5asdf
desired put put
$cat combined.txt
s1 s2 (2 Replies)
:confused:Hello -- i just joined the forums. I am a complete noob -- only about 1 week into learning how to program anything... and starting with linux.
I am working in Linux terminal.
I have a folder with a bunch of txt files. Each file has several lines of html code. I want to combine... (2 Replies)
I would like to join two files when two columns in each file matches with each other and then produce an output when taking multiple columns.
Like I have file A
1234,ABCD,23,JOHN,NJ,USA
2345,ABCD,24,SAM,NY,USA
5678,GHIJ,24,TOM,NY,USA
5678,WXYZ,27,MAT,NJ,USA
and file B
... (2 Replies)
Hello Everyone,
I have 4 different files (one column in each) that I'm trying to combine into 1 file with four columns. Having issues trying to get the columns to format properly. I have tried the following:
paste file1 file2 file3 file4 | column -s $'\t' -t > results.txt
paste file1 file2... (1 Reply)
Hello Unix gurus,
I have a large number of files (say X) each containing two columns of data and the same number of rows.
I would like to combine these files to create a unique merged file containing X columns corresponding to the second column of each file (with a bonus of having the first... (3 Replies)
Discussion started by: ksennin
3 Replies
LEARN ABOUT BSD
chpass
CHPASS(1) General Commands Manual CHPASS(1)NAME
chpass - add or change user database information
SYNOPSIS
chpass [ -a list ] [ user ]
DESCRIPTION
Chpass allows editing of the user database information associated with user or, by default, the current user. The information is formatted
and supplied to an editor for changes. The vi editor will be used unless the environmental variable EDITOR selects an alternate editor.
When the editor terminates, the information is re-read and used to update the user database itself. Only the user, or the super-user, may
edit the information associated with the user.
Only the information that the user is allowed to change is displayed.
Possible display items are as follows:
Login: user's login name
Password: user's encrypted password
Uid: user's id
Gid: user's login group id
Change: password change time
Expire: account expiration time
Class: user's general classification
Home Directory: user's home directory
Shell: user's login shell
Full Name: user's real name
Location: user's normal location
Home Phone: user's home phone
Office Phone: user's office phone
The login field is the user name used to access the computer account.
The password field contains the encrypted form of the user's password.
The uid field is the number associated with the login field. Both of these fields should be unique across the system (and often across a
group of systems) as they control file access.
While it is possible to have multiple entries with identical login names and/or identical user id's, it is usually a mistake to do so.
Routines that manipulate these files will often return only one of the multiple entries, and that one by random selection.
The group field is the group that the user will be placed in upon login. Since this system supports multiple groups (see groups(1)) this
field currently has little special meaning. This field may be filled in with either a number or a group name (see group(5)).
The change field is the date by which the password must be changed.
The expire field is the date on which the account expires.
Both the change and expire fields should be entered in the form ``month day year'' where month is the month name (the first three charac-
ters are sufficient), day is the day of the month, and year is the year.
The class field is currently unused. In the near future it will be a key to a termcap(5) style database of user attributes.
The user's home directory is the full UNIX path name where the user will be placed on login.
The shell field is the command interpreter the user prefers. If the shell field is empty, the Bourne shell (/bin/sh) is assumed.
When altering a login shell, and not the super-user, the user must select an approved shell from the list in /etc/shells.
The last four fields are for storing the user's full name, office location, and home and work telephone numbers.
The super-user is also allowed to directly supply a user database entry, in the format specified by passwd(5), as an argument to the -a
option. This argument must be a colon (``:'') separated list of all the user database fields, although they may be empty.
Once the information has been verified, chpass uses mkpasswd(8) to update the user database. This is run in the background, and, at very
large sites could take several minutes. Until this update is completed, the password file is unavailable for other updates and the new
information will not be available to programs.
FILES
/etc/master.passwd The user database /etc/shells The list of approved shells
SEE ALSO login(1), finger(1), getusershell(3), passwd(5), mkpasswd(8), vipw(8)
Robert Morris and Ken Thompson, UNIX password security
BUGS
User information should (and eventually will) be stored elsewhere.
4th Berkeley Distribution March 12, 1989 CHPASS(1)