02-04-2014
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi all! Im wondering if its possible to remove all lines between two lines. Im working with a document like this:
data1
data2
<Remove>
data3
data4
</Remove>
data5
data6
I need it to end up like this if that possible:
data1
data2
data5
data6
There are multiple instances of... (2 Replies)
Discussion started by: Grizzly
2 Replies
2. Shell Programming and Scripting
Hello,
I was wondering if there was an easy way to take lines from a single-column list, and remove them from a second single-column list. For example, I want to remove the contents of list 1 from list 2. How would I do this?
Contents of list 1:
server1a
server2b
server3c
server4a... (2 Replies)
Discussion started by: LinuxRacr
2 Replies
3. UNIX for Advanced & Expert Users
Hi All,
I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space.
I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Discussion started by: krishnix
16 Replies
4. UNIX for Dummies Questions & Answers
I am trying to remove the lines listed in example File A from File B to achieve File C. Both files are much larger than the examples below. (File B has up to 6,000 lines).
I have searched the forums and I have not been able to find an answer to this particular question.
I tried
grep -v -f... (2 Replies)
Discussion started by: pezziza
2 Replies
5. Shell Programming and Scripting
Hello to all, happy new year 2013!
May somebody could help me, is about a very similar problem to the problem I've posted here where the member rdrtx1 and bipinajith helped me a lot.
https://www.unix.com/shell-programming-scripting/211147-map-values-blocks-single-line-2.html
It is very... (3 Replies)
Discussion started by: Ophiuchus
3 Replies
6. UNIX for Dummies Questions & Answers
I would like to print unique lines without sort or unique. Unfortunately the server I am working on does not have sort or unique. I have not been able to contact the administrator of the server to ask him to add it for several weeks. (7 Replies)
Discussion started by: cokedude
7 Replies
7. Emergency UNIX and Linux Support
Hi, I have data that looks similar to this:
In which the sentences are written horizontally and the beginning of a sentence is indicated by a 1 in the first column and the number increments until the last item of the sentence. The end of the sentence and the beginning of the next is then indicate... (1 Reply)
Discussion started by: owwow14
1 Replies
8. UNIX for Dummies Questions & Answers
Hi Everybody! First post! Totally noobie.
I'm using the terminal to read a poorly formatted book.
The text file contains, in the middle of paragraphs, hyphenation to split words that are supposed to be on multiple pages. It looks ve -- ry much like this.
I was hoping to use grep -v " -- "... (5 Replies)
Discussion started by: AxeHandle
5 Replies
9. UNIX for Dummies Questions & Answers
Background:
I have a file of thousands of potential SSR primers from Batch Primer 3.
I can't use primers that will contain the same sequence ID or sequence as another primer.
I have some basic shell scripting skills, but not enough to handle this.
What you need to know:
I need to remove the... (1 Reply)
Discussion started by: msatseqs
1 Replies
10. Shell Programming and Scripting
Hi - I have req to join broken lines and remove empty lines but should NOT be in one line. It has to be as is line by line. The challenge here is there is no end of line/start of line char.
thanks in advance
Source:-
2003-04-34024|04-10-2003|Claims|Claim|01-13-2003|Air Bag:Driver;... (7 Replies)
Discussion started by: Jackceasar123
7 Replies
LEARN ABOUT LINUX
setegid
SETEUID(2) Linux Programmer's Manual SETEUID(2)
NAME
seteuid, setegid - set effective user or group ID
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
int seteuid(uid_t euid);
int setegid(gid_t egid);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
seteuid(), setegid():
_BSD_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
DESCRIPTION
seteuid() sets the effective user ID of the calling process. Unprivileged user processes may only set the effective user ID to the real
user ID, the effective user ID or the saved set-user-ID.
Precisely the same holds for setegid() with "group" instead of "user".
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EPERM The calling process is not privileged (Linux: does not have the CAP_SETUID capability in the case of seteuid(), or the CAP_SETGID
capability in the case of setegid()) and euid (respectively, egid) is not the real user (group) ID, the effective user (group) ID,
or the saved set-user-ID (saved set-group-ID).
CONFORMING TO
4.3BSD, POSIX.1-2001.
NOTES
Setting the effective user (group) ID to the saved set-user-ID (saved set-group-ID) is possible since Linux 1.1.37 (1.1.38). On an arbi-
trary system one should check _POSIX_SAVED_IDS.
Under libc4, libc5 and glibc 2.0 seteuid(euid) is equivalent to setreuid(-1, euid) and hence may change the saved set-user-ID. Under glibc
2.1 and later it is equivalent to setresuid(-1, euid, -1) and hence does not change the saved set-user-ID. Similar remarks hold for sete-
gid().
According to POSIX.1, seteuid() (setegid()) need not permit euid (egid) to be the same value as the current effective user (group) ID, and
some implementations do not permit this.
SEE ALSO
geteuid(2), setresuid(2), setreuid(2), setuid(2), capabilities(7), credentials(7)
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2009-10-17 SETEUID(2)