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slackbook:working_with_filesystems [2012/09/12 21:34 (UTC)]
mfillpot updated code block to syntax highlighting
slackbook:working_with_filesystems [2012/10/24 09:40 (UTC)] (current)
alienbob [Using mount] Fixed a paragraph which was erroneously copied from the previous chapter
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 ===== Using mount =====  ===== Using mount ===== 
  
-Unlike other filesystems ​which hold files and directoriesswap +Now that we've learned what (some of) the different ​filesystems 
-partitions hold virtual memoryThis is very useful as it prevents ​the +available in Linux areit's time we looked at how to use them. 
-system from crashing should all your RAM be consumed. Instead, ​the +In order to read or write data on a filesystem, that filesystem 
-kernel copies portions of the RAM into swap and frees them up for other +must first be mountedTo do this, we (naturally) use mount(8). 
-applications ​to use. Think of it as adding virtual memory ​to your +The first thing we must do is decide where we want the filesystem 
-computervery slow virtual memoryswap is typically a fail-safe and +located. Recall that there are no such things are drive letters 
-shouldn'be relied upon for continual ​use. Add more RAM to your system +denoting filesystems in Linux. Instead, ​all filesystems are mounted 
-if you find yourself using lots of swap+on directories. The base filesystem on which you install Slackware 
 +is always located at ''/'' ​and others are always located in 
 +subdirectories of ''/''​. ''/​mnt/​hd''​ is a common place to temporarily 
 +locate a partition, so we'​ll ​use that in our first example. 
 +In order to mount a filesystem'​s contents, we must tell mount what 
 +kind of filesystem we havewhere to mount it, and any special 
 +options to use. 
 + 
 +<​code>​ 
 +darkstar:~# mount -t ext3 /dev/hda3 /mnt/hd -o ro 
 +</​code>​ 
 + 
 +Let's disect this. We have an ext3 filesystem located on the third 
 +partition of the first IDE device, and we've decided to mount its 
 +contents on the directory /mnt/hd. Additionally,​ we have mounted it 
 +read-only so no changes can be made to these contents. The [-t ext3] 
 +argument tells mount what type of filesystem we are using, in this 
 +case it is ext3. This lets the kernel know which driver to use. 
 +Often mount can determine this for itself, but it never hurts to 
 +explicitly declare it. Second, we tell mount where to locate the 
 +filesystem'​s contents. Here we've chosen ''/​mnt/​hd''​. Finally, 
 +we must decide what options to use if any. These are declared with 
 +the [-o] argument. A short-list ​of the most common options follows
  
 **Table 11.2. Common mount options** **Table 11.2. Common mount options**
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-<​code ​bash>+<​code>​
 darkstar:~# mount -t vfat /dev/hda4 /mnt/hd -o uid=alan darkstar:~# mount -t vfat /dev/hda4 /mnt/hd -o uid=alan
 </​code>​ </​code>​
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-<​code ​bash>+<​code>​
 darkstar:~# cat /etc/fstab darkstar:~# cat /etc/fstab
 /​dev/​hda1 ​       /                reiserfs ​   defaults ​              ​1 ​  1 /​dev/​hda1 ​       /                reiserfs ​   defaults ​              ​1 ​  1
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-<​code ​bash>+<​code>​
 darkstar:~# mount /dev/cdrom darkstar:~# mount /dev/cdrom
 darkstar:~# mount /home darkstar:~# mount /home
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-<​code ​bash>+<​code>​
 darkstar:~# chmod +x /​etc/​rc.d/​rc.rpc darkstar:~# chmod +x /​etc/​rc.d/​rc.rpc
 darkstar:~# /​etc/​rc.d/​rc.rpc start darkstar:~# /​etc/​rc.d/​rc.rpc start
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-<​code ​bash>+<​code>​
 darkstar:~# mount -t nfs darkstar.example.com:/​home /home darkstar:~# mount -t nfs darkstar.example.com:/​home /home
 </​code>​ </​code>​
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-<​code ​bash>+<​code>​
 darkstar:~# mount -t cifs //​darkstar/​home /home -o username=alan,​password=secret darkstar:~# mount -t cifs //​darkstar/​home /home -o username=alan,​password=secret
 </​code>​ </​code>​
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-<​code ​bash>+<​code>​
 darkstar:~# echo "​username=alan"​ > /​etc/​creds-home darkstar:~# echo "​username=alan"​ > /​etc/​creds-home
 darkstar:~# echo "​password=secret"​ >> /​etc/​creds-home darkstar:~# echo "​password=secret"​ >> /​etc/​creds-home

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