Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
How to resume a partially-downloaded file using wget
Answer:
Use the -c flag, e.g.
# wget -c ftp://sunsite.doc.ic.ac.uk/ls-lR.Z
If there is a file named ls-lR.Z in the current directory, Wget will assume that it is the first portion of the remote file, and will ask the server to continue the retrieval from an offset equal to the length of the local file.
Reference: http://www.gnu.org/software/wget/manual/wget.html
Disable AppArmor in Ubuntu
Answer:
A lot of people don't like AppArmor and think it is too annoying, just like the SELinux, people sometimes want to disable it.
To do so:
# sudo invoke-rc.d apparmor stop
# sudo update-rc.d -f apparmor remove
How to determine the type of a file in Linux
Answer:
The file command is what you need, e.g.
# file /bin/gzip
/bin/gzip: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
dynamically linked (uses shared libs), for GNU/Linux 2.6.15
# file /usr/share/doc/apt/changelog.gz
/usr/share/doc/apt/changelog.gz: gzip compressed data, from Unix,
max compression
How to decompresses a gzipped file
Answer:
1. Use the gunzip command
# gunzip test.gz
1. Use the gzip command, and the -d flag
# gzip -d test.gz
How to enable Direct memory access (DMA) on your SATA/IDE hard disk
Answer:
Execute the following command
# hdparm -d1 /dev/hda
Where hda is the first hard disk in your system.
