The Substitution String for an Indirect Map
The following entry reduces the auto_home file to a single line. The use of substitution characters specifies that for every login ID, the client remotely mounts the export home loginID directory from the NFS server serverl onto the local mount point home loginID. This entry uses the wildcard character to match any key the substitution character amp at the end of the location specification is replaced with the matched key field. This works only when all home directories are on a single server...
Encapsulation and Deencapsulation
When systems communicate with each other, data can be thought of as flowing down the model from the application layer to the hardware layer, across the network connection, and then flowing up the model on the target system from the hardware layer to the application layer. A header is added to each segment received on the way down the model, and a header is removed from each segment on the way up the model, as shown in Figure 2-2. Each header contains specific address information so that the...
Default coreadm Command Without Options
Using the coreadm with no options displays the typical default settings from the etc coreadm.conf file. global core dumps disabled per-process core dumps enabled global setid core dumps disabled per-process setid core dumps disabled global core dump logging disabled The first line of output identifies the name to use for core files placed in a global directory. When generated, a global core file is created with mode 600 and is owned by the superuser. Non-privileged users cannot examine such...
The fdfs File System
The fdfs file system is a pseudo file system that maintains a repository of file descriptors for open files. Running programs access files by using these file descriptors. The following example from the etc vfstab file shows the mounting of the fdfs file system on the dev fd mount point at system boot time device device mount FS fsck mount mount to mount to fsck point type pass at boot options fd - dev fd fd - no - Table 5-1 describes each file descriptor. Table 5-1 File Descriptor Usage Table...
ypinit m
b. The ypinit command lists the current system as an NIS server, and then asks for the next host to add as a NIS slave server. In this lab, you set up only a master and a client. Press Control-D to terminate the list. next host to add master_server next host to add Control-d list of servers is this list correct y n y y c. Indicate that you do not want ypinit to quit on nonfatal errors. The ypinit command then proceeds to build the required maps. quit on nonfatal errors y n n n If the...
Sample sysidcfg File
The following rules apply to the sysidcfg file Keywords can be in any order. Keywords are not case sensitive. Keyword values can be optionally enclosed in single ' or double quotes. Only the first instance of a keyword is valid if a keyword is specified more than once, the first keyword specified is used. The following is an example of a sysidcfg file Sample sysidcfg file for SPARC systems network_interface PRIMARY protocol_ipv6 yes netmask 255.255.255.0
The Client autofs File System
The autofs file system is a kernel file system that supports automatic mounting and unmounting. When you make a request to access a file system at an autofs mount point, the following occurs 1. The autofs file system intercepts the request. 2. The autofs file system sends a message to the automountd daemon for the requested file system to be mounted. 3. The automountd daemon locates the file system information in a map and performs the mount. 4. The autofs file system allows the intercepted...
cfsadmin l cachecache0
cfsadmin list cache FS information maxblocks 90 minblocks 0 maxblocks - Maximum amount of storage space that CacheFS can use, expressed as a percentage of the total number of blocks in the front file system. minblocks - Minimum amount of storage space expressed as a percentage of the total number of blocks in the front file system that CacheFS is always allowed to use without limitation by its internal control mechanisms. threshblocks - A percentage of the total blocks in the front file system...
The dumpadm Command
The dumpadm program is an administrative command that manages the configuration of the operating system crash dump facility. Note - A panic dump contains a copy of the interesting portions of physical memory at the time of a fatal system error. If a fatal operating system error occurs, a message describing the error is printed to the console. The operating system then generates a crash dump by writing the contents of physical memory to a predetermined dump device, which is typically a local...