How do you write a shell script that change the extension of all the files?
e.g
chext rtf doc
where .rtf is the original extension
and .doc is the new extension
is it something to do with basename?
do I need a for loop?
Please help!
Unix SuperNewbie (4 Replies)
Hi
I am writing a script which does an FTP of a set of files onto another machine and then would have to rename the files into a different extension on the source machine.
for example if the file being sent via FTP is sample.txt. Once the file has been transferred i would want to modify the... (2 Replies)
Interpreter should be bash.
1. The problem statement, all variables and given/known data:
I need to make a file (myText.txt or song.mp3 or cloud.tar.gz or whatever) and then change the extension to (myText.TXT , song.MP3, cloud.TAR.GZ).
It would be good if I can add all information in... (4 Replies)
I searched the forum, but there was different type of rename.
Hello.
I have files in folder.
Like:
xxxxxxxx1.html
or
xxxxxxxx2.txt
or
xxxxxxxx3.tar.gz
and how to rename or change file extension case to
xxxxxxxx1.htm
or
xxxxxxx2.TXT
or (5 Replies)
I have a directory that contains several files, out of which some files are have an extra extension for example
file1.new.new.new
file2.new.new.new
file3.new.new.new
file4.new.new.new
i want to write a shell script that rename all such file with only single extension like
file1.new... (7 Replies)
I need to write a script to :
list files with *.i extension in a directory and all its subdirectories + 30days old, save it in a file and then remove (2 Replies)
We are having a little problem on a server. We want that some users should be able to do e.g. sudo and become root, but with the restriction that the user can't change root password. That is, a guarantee that we still can login to that server and become root no matter of what the other users will... (2 Replies)
Hi Team,
Am a newbie to Unix. As I would like to see the Server Name,Owner Name ( not numeric form), Group Name ( not numeric ID), ROOT path.
I would like to send this list as an attachment to my personal mail. Can any one please help me out to to resolve this .
Here is the sample result... (6 Replies)
Hi Guys,
i am trying to redirect a file wherein i need to change the extension of the file from .sh to .tmp, but getting an error
a=test.txt
sh test.txt > path/$(basename "$a" .sh).tmp
i need
test.tmp
---------- Post updated at 02:09 AM ---------- Previous update was at... (3 Replies)
i do not have root on a solairs 10 server , however i do have the root role, i was wondering if I can change the root password as a a role with the passwd command? I have not tried yet.
and do i have to use the # chgkey -p afterwards?
i need to patch is why i am asking.
thanks (1 Reply)
Discussion started by: goya
1 Replies
LEARN ABOUT POSIX
pivot_root
PIVOT_ROOT(8) System Administration PIVOT_ROOT(8)NAME
pivot_root - change the root filesystem
SYNOPSIS
pivot_root new_root put_old
DESCRIPTION
pivot_root moves the root file system of the current process to the directory put_old and makes new_root the new root file system. Since
pivot_root(8) simply calls pivot_root(2), we refer to the man page of the latter for further details.
Note that, depending on the implementation of pivot_root, root and cwd of the caller may or may not change. The following is a sequence for
invoking pivot_root that works in either case, assuming that pivot_root and chroot are in the current PATH:
cd new_root
pivot_root . put_old
exec chroot . command
Note that chroot must be available under the old root and under the new root, because pivot_root may or may not have implicitly changed the
root directory of the shell.
Note that exec chroot changes the running executable, which is necessary if the old root directory should be unmounted afterwards. Also
note that standard input, output, and error may still point to a device on the old root file system, keeping it busy. They can easily be
changed when invoking chroot (see below; note the absence of leading slashes to make it work whether pivot_root has changed the shell's
root or not).
OPTIONS -V, --version
Display version information and exit.
-h, --help
Display help text and exit.
EXAMPLES
Change the root file system to /dev/hda1 from an interactive shell:
mount /dev/hda1 /new-root
cd /new-root
pivot_root . old-root
exec chroot . sh <dev/console >dev/console 2>&1
umount /old-root
Mount the new root file system over NFS from 10.0.0.1:/my_root and run init:
ifconfig lo 127.0.0.1 up # for portmap
# configure Ethernet or such
portmap # for lockd (implicitly started by mount)
mount -o ro 10.0.0.1:/my_root /mnt
killall portmap # portmap keeps old root busy
cd /mnt
pivot_root . old_root
exec chroot . sh -c 'umount /old_root; exec /sbin/init'
<dev/console >dev/console 2>&1
SEE ALSO chroot(1), pivot_root(2), mount(8), switch_root(8), umount(8)AVAILABILITY
The pivot_root command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.
util-linux August 2011 PIVOT_ROOT(8)