Linux, FreeBSD, Juniper, Cisco / Network security articles and troubleshooting guides

Register

FAQ

It is currently Sat Jan 23, 2021 8:18 am

ROOT ‹ FreeBSD, Linux and AIX ‹ Shell Scripting and Programming ‹ Remove the character before the last character with SED - shell scripting

Tips & Tricks, Questions regarding shell scripts, awk, perl, sed and much more.

1 post • Page 1 of 1

Remove the character before the last character with SED - shell scripting

« Previous topic | Next topic »

Author

Message

Post subject: Remove the character before the last character with SED - shell scripting | Posted: Wed Nov 04, 2009 10:49 am

Joined: Tue Aug 04, 2009 9:16 am
Posts: 250

Remove the character before the last character with SED - shell scripting

Removing the character before the last character with SED - shell scripting.

Today I received a comment to my "How to remove first/last character from a string using SED" article: http://www.ivorde.ro/How_to_remove_first_last_character_from_a_string_using_SED-75.html

Similar to removing the last character (cat files |sed 's/\(.*\)./\1/'), here's how to remove the character before the last character.

Below is a simple rpm -qa output

Code:

# rpm -qa | head
libgcc-3.2.3-54
setup-2.5.27-1
basesystem-8.0-2
glibc-2.3.2-95.39
bzip2-libs-1.0.2-11.EL3.4
cracklib-2.7-22
e2fsprogs-1.32-15.1
ethtool-1.8-3.3
gdbm-1.8.0-20
glib2-2.2.3-2.0

So we want to remove the "5", "-", "-", "3" and so on characters (before the last characters) of each line:

Code:

# rpm -qa | head  | sed 's/\(.*\)\(.\{1\}\)\(.\{1\}\)/\1\3/g'
libgcc-3.2.3-4
setup-2.5.271
basesystem-8.02
glibc-2.3.2-95.9
bzip2-libs-1.0.2-11.EL34
cracklib-2.7-2
e2fsprogs-1.32-151
ethtool-1.8-33
gdbm-1.8.0-0
glib2-2.2.3-20

Similar code is for removing the second character in a string.

			Tweet
Follow @IvordeCom

You might also be interested in:
Shell scripting. How to replace dot or any character with AWK. Remove empty lines in vi/vim. SED how to remove multiple white spaces from a string. Unix shell - using TR to replace new lines with spaces. How to echo newline in Linux/Unix shell. How to add line numbers in unix shell output. BASH shell script to mointor a directory and move file without overwriting destination.

Top

1 post • Page 1 of 1

Topics			Author	Replies	Views	Last post
Topics related to - "Remove the character before the last character with SED - shell scripting"
		Shell scripting	Diana	0	1303	Thu Aug 24, 2017 3:10 am Diana
		How to replace dot or any character with AWK	mandrei99	0	15447	Tue Jan 28, 2014 6:35 am mandrei99
		Remove empty lines in vi/vim	debuser	0	1810	Mon Apr 26, 2010 11:06 am debuser
		SED how to remove multiple white spaces from a string	debuser	0	10767	Thu Feb 25, 2010 7:14 am debuser
		Unix shell - using TR to replace new lines with spaces	debuser	0	8244	Thu Feb 25, 2010 8:08 am debuser
		How to echo newline in Linux/Unix shell	mandrei99	0	78736	Tue Jun 25, 2013 5:58 am mandrei99
		How to add line numbers in unix shell output	mandrei99	0	2555	Fri Oct 31, 2014 5:31 am mandrei99
		BASH shell script to mointor a directory and move file without overwriting destination	admin	0	1718	Wed Nov 15, 2017 7:48 am admin

Who is online

Users browsing this forum: No registered users and 0 guests

You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:

ROOT ‹ FreeBSD, Linux and AIX ‹ Shell Scripting and Programming

Delete all board cookies | The team | All times are UTC - 5 hours [ DST ]

phpBB SEO