• associate the file with a loop device node:
  # losetup /dev/loop0 /var/otheros.img
• list the partition table of the device:
  

  # fdisk -l /dev/loop0 
  Disk /dev/loop0: 21.4 GB, 21474837504 bytes 
  255 heads, 63 sectors/track, 2610 cylinders 
  Units = cylinders of 16065 * 512 = 8225280 bytes 
        Device Boot      Start         End      Blocks   Id  System 
  /dev/loop0p1   *           1        2609    20956761    7  HPFS/NTFS

• create device map (kpartx is part of multipath-tools package on Ubuntu):
  

  # kpartx -a /dev/loop0
  # ls -l /dev/mapper/ 
  total 0 
  crw-rw---- 1 root root  10, 62 Jul  6  2008 control
  brw-rw---- 1 root disk 253,  0 Jul  5 23:18 loop0p1 

• mount the device partition:
  # mount /dev/mapper/loop0p1 /mnt

Posted by: Z24 | Wed, May 04 2011 | Category: /linux | Permanent link | home
Tagged as: command-line, linux, shell

Pausing a command

How to pause / suspend / sleep a running command in a terminal?
Press Ctrl+S
How to resume the paused command?
Press Ctrl+Q

  

Posted by: Z24 | Wed, May 04 2011 | Category: /linux | Permanent link | home
Tagged as: command-line, linux, shell

How to rename multiple files from bash

Rename all *html files to *test:

for x in `ls *html`; do mv $x `echo $x | sed -e "s/html/test/"`; done

for var in some-list ; do command ; done

Posted by: Z24 | Wed, May 04 2011 | Category: /linux | Permanent link | home
Tagged as: command-line, linux, programming, script, shell

Execute a command at shutdown

To dismount TrueCrypt volumes at shutdown and reboot time, I created a script, put it in/etc/init.d/ and symlinked it into the needed /etc/rc?.d/ directories using update-rc.d.
Here is the detail:

See full post ...

Posted by: Z24 | Wed, May 04 2011 | Category: /linux | Permanent link | home
Tagged as: command-line, linux, programming, script, shell