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Q2) Write a command to find all of the files which have been accessed within the last 30 days. A1) The Command is , find / -atime +30 A2) # find / -type f -mtime +30 A3) find / -type f -mtime -30 A4) find / -type f -atime -30 = accessed find / -type f -ctime -30 = changed find / -type f -ctime -30 = modified Q3) How to schedule cron backup to run on 4th saturday of month?? A1) crontab -e ** ** ** ** /5 Q4) how to see unallocated hard disk space on linux A1) simply type cat /proc/partitions A2) df -h /dev/devicename device name could be hda,sda Q5) find out what file systems supported by kernel? A1) # fdisk /dev/hdx option: t it will show the supported FS in the kernel A2) cat /proc/filesystems will show all the file system types that the kernel can handle currently. Be aware that kernel will load the necessary modules automatically if it have, for a new file system type present in a new device you plug into it and then the output of the above command will vary. A3) you can give following commands #fdisk then press t this command will show all the file system with code supported by the current linux kernel. Q6) how do u extract files from iso cd images in linux?...