Hi,
Could you please explain me the below statement -- phrase wise.
sed -e :a -e '$q;N;'$cnt',$D;ba' abc.txt > xyz.txt
if suppose $cnt contains value: 10
it copies last 9 lines of abc.txt to xyz.txt
why it is copying last 9 rather than 10.
and also what is ba and $D over there in... (4 Replies)
Hi,
The following command works fine for me, but I could not grasp the logic working behind of sed command, it's obscure to me :( :confused:
echo "./20080916/core/audioex.amr" | sed "s%\(\)/%\1_%g"
o/p: ./20080916_core_audioex.amr
Could anyone please explain to me in detail, that how... (6 Replies)
Hello everyone,
I found this command line in a website:
perl -pi.bak -we's/\z/Your new line\n/ if $. == 2;' your_text_file.txt
With this command line you can insert a new line anywhere you want in a text without overwriting what's in it.
-p causes perl to assume a loop around your... (4 Replies)
This is my first post so hi to you all. I have browsed these forums in the past and what a great community and resource this is! Thanks to all the contributors ... I look forward to being able to give something back.
In the meantime, I have a little conundrum concerning sed. My very simple... (6 Replies)
Hi Friends,
I am trying to modify a script .The script contains this line:
sed -n -e 's_.*>\(.*\)<.*_\1_p' filename.xml
I am not great in sed command.I know, it is regular expression
to match a pattern string that starts with s_ and ends with 1_.I doesnot give the desired result.
Can... (4 Replies)
sed '$!N; /^\(.*\)\n\1$/!P; D'
i found this file which removes duplicates irrespective for sorted or unsorted file. keep first occurance and remove the further occurances.
can any1 explain how this is working..
i need to remove duplicates following file. duplicate criteria is not the... (3 Replies)
can anyone please tell me what does this expression means , i am under probation and need some explanation :)
$AUDIT_DIR -type f -mtime +$AUDIT_EXPIRE \ -exec rm {} > /dev/null 2>&1 \;
AUDIT_DIR="/var/log/"
AUDIT_EXPIRE='30'
Please use code tags! (4 Replies)
Hi everyone,
I am wondering if someone could please break down and explain the following sort command for me:
ls ${DEST_LOCATION}/${FILES} | sort -rt -k 4,4n | head -1
I have tried working it out using 'man sort', but on AIX there is not a great explanation of this function. I know that... (9 Replies)
Hi Folks,
I am struggling to understand nawk command which was used by another developer.
Can you please explain what each character or string is doing here below:
if ; then (3 Replies)
Discussion started by: kirans.229
3 Replies
LEARN ABOUT REDHAT
fs_rmmount
FS_RMMOUNT(1) AFS Command Reference FS_RMMOUNT(1)NAME
fs_rmmount - Removes a mount point
SYNOPSIS
fs rmmount -dir <directory>+ [-help]
fs rm -d <directory>+ [-h]
DESCRIPTION
The fs rmmount command removes the mount point named by the -dir argument from the file system. The corresponding volume remains on its
host partition or partitions, but is inaccessible if there are no other mount points for it.
OPTIONS -dir <directory>+
Names the mount point to delete from the file system. The last element in the pathname must be an actual name, not a shorthand notation
such as "dot" (".") or "dot dot" ("..").
Specify the read/write path to the directory, to avoid the failure that results from attempting to delete a mount point from a read-
only volume. By convention, the read/write path is indicated by placing a period before the cell name at the pathname's second level
(for example, /afs/.abc.com). For further discussion of the concept of read/write and read-only paths through the filespace, see the fs
mkmount reference page.
-help
Prints the online help for this command. All other valid options are ignored.
EXAMPLES
The following command removes the mount points jones and terry from the current working directory (the /afs/abc.com/usr directory).
% fs rmmount jones terry
PRIVILEGE REQUIRED
The issuer must have the "d" (delete) permission on the ACL of the directory that houses each mount point.
SEE ALSO fs_lsmount(1), fs_mkmount(1)COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas
Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2012-03-26 FS_RMMOUNT(1)