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Full Discussion: How to select line by line in shell
Top Forums UNIX for Dummies Questions & Answers How to select line by line in shell Post 302092677 by preethgideon on Wednesday 11th of October 2006 06:22:10 PM
Old 10-11-2006
How to select line by line in shell
Hi,
This is what the file data.lst contains.


aaaaaaaa eeeeeeeeeeeeeeee 4444444 rrrrrrrrrrrrr tttttttttttt
bbbbbbbb eeeeeeeeeeeeeeee 7777777 uuuuuuuu eeeeeeeee
qqqqqqqq gggggggggggggggg 6666666 oooooooo ppppppppp
Here I want to cut the third field and put it in a new file
I tried this way

echo
for i in `cat data.lst`
do
echo $i | cut -c 30-37 >> newfile.lst
done


But this doesn't work.Can someone help me.
Thanks in advance
Last edited by preethgideon; 10-11-2006 at 07:28 PM..
 

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LEARN ABOUT PLAN9

chsh

CHSH(1)                                                            User Commands                                                           CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
           Display help message and exit.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
           The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
           User account information.

       /etc/shells
           List of valid login shells.

       /etc/login.defs
           Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.5                                                    01/25/2018                                                             CHSH(1)
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