Sponsored Content
Top Forums Shell Programming and Scripting cat /etc/passwd and grep -v on /etc/shells Post 302346269 by itik on Friday 21st of August 2009 11:20:38 AM
Old 08-21-2009
cat /etc/passwd and grep -v on /etc/shells

Hi All,

I'd like to do this

cat /etc/passwd

and grep -v on the /etc/shells list

I'd like to find all shell that doesn't exist on the /etc/passwd.

Is there an easy way without doing a egrep -v "/bin/sh|/bin/bash................"?

How do I use a file /etc/shells as my list for search entries?

Thanks and more power.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

grep group and passwd file

How can I find find all members in the /etc/password file that belong to the dba group in the /etc/group file? (4 Replies)
Discussion started by: mozartny
4 Replies

2. UNIX for Advanced & Expert Users

cat and grep not working

I am trying to cat a file and then grep that file for a number. I can do it fine on other files but this particular file will not do anything. I tried running it on an older file from the same device but it is just not working. The file is nothing more than a flat file on a unix box. Here is just a... (3 Replies)
Discussion started by: jphess
3 Replies

3. UNIX for Dummies Questions & Answers

cat, grep and tee to a local file

Hi, This is what I am trying to do. 1) connect to 3 remote servers from my local machine serverA serverB serverC 2) read error file from each server cat /var/lib/mysql/mydb.err 3) grep for lines displaying "yesterday" date grep "`date +%y%m%d' '-d\"1 day ago\"`" 4) Append those lines to a... (7 Replies)
Discussion started by: shantanuo
7 Replies

4. Linux

/etc/shells on /etc/passwd

Hi All, Why does these list (below) doesn't belong to /etc/shells? sync:x:5:0:********************// :/sbin:/bin/sync shutdown:x:6:0:********************// :/sbin:/sbin/shutdown halt:x:7:0:********************// :/sbin:/sbin/halt webalizer:x:68:68:***************// ... (2 Replies)
Discussion started by: itik
2 Replies

5. Shell Programming and Scripting

cat -n and grep

I am not sure if using cat -n is the most efficient way to split a file into multiple files, one file per line in the source file. I thought using cat -n would make it easy to process the file because it produces an output that numbers each line that I could then grep for with the regex "^ *$i".... (3 Replies)
Discussion started by: kapu
3 Replies

6. Shell Programming and Scripting

grep or cat using sed

Is there a way using grep or cat a file to create a new file based on whether the first 9 positions of each record is less than 399999999? This is a fixed file format. (3 Replies)
Discussion started by: ski
3 Replies

7. Shell Programming and Scripting

Directing cat or grep command in variable

Hi, I still have the problem with directing information from cat or grep to a variable. For instance: XMSG "$(date +%Y_%m_%d)_error_report.txt" "$(cat "$(date +%Y_%m_%d)_error_report.txt")" &Works! The text received by cat is directed to my function. If it is written like this, my... (2 Replies)
Discussion started by: haukee
2 Replies

8. UNIX for Dummies Questions & Answers

Grep and cat combined

Hello, i need to search one word (snp1) from many files and copy the content of the columns of this word in new file. example: file 1: SNP BP CHR P snp1 1 3 0.01 snp2 2 2 0.05 . . file 2: SNP BP CHR P snp1 1 3 0.06 snp2 2 2 0.3 output... (6 Replies)
Discussion started by: biopsy
6 Replies

9. Shell Programming and Scripting

Replace cat and grep with <

Hello someone told me to use OS=`awk '{print int($3)}' < /etc/redhat-release` instead of OS=cat /etc/redhat-release | `awk '{print int($3)}'` any idea for the reason ? (5 Replies)
Discussion started by: nimafire
5 Replies

10. UNIX for Dummies Questions & Answers

Grep or cat The Whole Directory PROBLEMS :(

Hi Guys This is my first post so I am not sure how things go here. I'm sorry if I'm breaking the rule or something. Feel free to correct me about that :) So as I was saying... I'd been trying to grep this folder containing 900,000 txt files but seems no luck. I get either "No such file... (6 Replies)
Discussion started by: Nexeu
6 Replies
chsh(1) 						      General Commands Manual							   chsh(1)

NAME
chsh - change login shell SYNOPSIS
chsh [-D binddn] [-P path] [-s shell] [-l] [-q] [-u] [-v] [user] DESCRIPTION
chsh is used to change the user login shell. A normal user may only change the login shell for their own account, the super user may change the login shell for any account. If a shell is not given on the command line, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new value to change the field, or leave the line blank to use the current value. Enter none to remove the current value. The current value is displayed between a pair of [ ] marks. The only restrictions placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the super- user, and then any value may be added. An account with a restricted login shell may not change their login shell. This version of chsh is able to change the shell of local, NIS, NIS+ and LDAP accounts , if the permissions allow it. OPTIONS
-D, --binddn binddn Use the Distinguished Name binddn to bind to the LDAP directory. The user will be prompted for a password for simple authentica- tion. -P, --path path The passwd file is located below the specified directory path. chsh will use this files, not /etc/passwd. This is useful for exam- ple on NIS master servers, where you do not want to give all users in the NIS database automatic access to your NIS server and the NIS map is build from special files. -s, --shell Specify your login shell. -l, --list-shells Print the list of shells listed in /etc/shells and exit. -q, --quite Don't be verbose. -u, --usage Print a usage message and exit. --help Print a more verbose help text and exit. -v, --version Print version information and exit. FILES
/etc/passwd - user account information /etc/shells - list of valid login shells SEE ALSO
chfn(1), passwd(5), shells(5) AUTHOR
Thorsten Kukuk <kukuk@suse.de> pwdutils February 2004 chsh(1)
All times are GMT -4. The time now is 11:18 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy