SHELL BUILTIN COMMANDS
Unless otherwise noted, each builtin command documented in
this section as accepting options preceded by - accepts --
to signify the end of the options.
: [arguments]
No effect; the command does nothing beyond expanding
arguments and performing any specified redirections. A
zero exit code is returned.
. filename [arguments]
source filename [arguments]
Read and execute commands from filename in the current
shell environment and return the exit status of the
last command executed from filename. If filename does
not contain a slash, file names in PATH are used to
find the directory containing filename. The file
searched for in PATH need not be executable. When bash
is not in posix mode, the current directory is searched
if no file is found in PATH. If the sourcepath option
to the shopt builtin command is turned off, the PATH is
not searched. If any arguments are supplied, they
become the positional parameters when filename is exe-
cuted. Otherwise the positional parameters are
unchanged. The return status is the status of the last
command exited within the script (0 if no commands are
executed), and false if filename is not found or cannot
be read.
hey. i am a bit new to unix and i am trying to figure out how to list the names of the 'dot' files that are in my account.
what command does this?
thank you very much for your help. (4 Replies)
Hi
I've got a trivial question on using ed (yes, I know, other editors are better!)
How do I insert a line that is just a single dot? (That is, how do I insert a line that starts with a dot and then new line)
Thanks
Peter (4 Replies)
HI
I have a messaging s/w daemon(TIBCO rvrd) provided by vendor which will accept connections from various clients and routes messages to the destinations. In order to route it internally uses two ports(one tcp adn one udp).
I want to know on which port(tcp/udp) it is transmitting... (3 Replies)
I'm writing a monitoring application. I'd like to periodically get the information provided by the 'top' command line utility from within my code and write the output of 'top' to a file. Wondering if anyone has already done something like this.
Doing
system("top > someFile");
does not create... (6 Replies)
Hi every one,
i have to dot pc files. One have main function but one dont have.I have to call dot pc file using system () cmd.File is being call have main function.Please let me know how i can call .pc file with two arguments from other dot pc file.I want some thing like
sprintf(buf,... (1 Reply)
To read/write to a DB from Java or Perl, you usually have to install/reference several drivers and write a whole bunch of boilerplate DB access code.
I'm curious if someone has written a command line utility for Unix/Linux for simple database access for the major providers, something like:
... (3 Replies)
Hi,
Using command-line utility "ftp or sftp", I want to transfer files across Windows and UNIX.
Can you please tell me from where I need to connect to ftp and how do I specify the hostname, credentials and how do I get and put files between DOS and UNIX?
Please provide me as much... (10 Replies)
Hi,
I'm running a rdt (run dot tcl) command, and come accross this line:
alias abc 'set ARGS =(\!*); source home123/abc/$ARGS/setup'
What does the command exactly do?
Please help. (6 Replies)
Hi Everyone!
I am facing an issue in running a command line utility from the CRON.
This utility displays IPC statistics on UNIX message queues: The "queue name" and the "count" of messages in the queue.
When running this utility from prompt, it will provide an output on the screen, like the... (4 Replies)
Discussion started by: vai_sh
4 Replies
LEARN ABOUT HPUX
cd
cd(1) General Commands Manual cd(1)NAME
cd - change working directory
SYNOPSIS
[directory]
DESCRIPTION
If directory is not specified, the value of shell parameter is used as the new working directory. If directory specifies a complete path
starting with or directory becomes the new working directory. If neither case applies, tries to find the designated directory relative to
one of the paths specified by the shell variable. has the same syntax as, and similar semantics to, the shell variable. must have execute
(search) permission in directory.
exists only as a shell built-in command because a new process is created whenever a command is executed, making useless if written and pro-
cessed as a normal system command. Moreover, different shells provide different implementations of as a built-in utility. Features of as
described here may not be supported by all the shells. Refer to individual shell manual entries for differences.
If is called in a subshell or a separate utility execution environment such as:
(which invokes on accessible directories) does not affect the current directory of the caller's environment. Another usage of as a stand-
alone command is to obtain the exit status of the command.
EXTERNAL INFLUENCES
International Code Set Support
Single- and multi-byte character code sets are supported.
Environment Variables
The following environment variables affect the execution of
The name of the home directory,
used when no directory operand is specified.
A colon-separated list of pathnames that refer to directories.
If the directory operand does not begin with a slash character, and the first component is not dot or dot-dot, searches
for directory relative to each directory named in the variable, in the order listed. The new working directory is set
to the first matching directory found. An empty string in place of a directory pathname represents the current direc-
tory. If is not set, it is treated as if it was an empty string.
EXAMPLES
Change the current working directory to the directory from any location in the file system:
Change to new current working directory residing in the current directory:
or
Change to directory residing in the current directory's parent directory:
Change to the directory whose absolute pathname is
Change to the directory relative to home directory:
RETURN VALUE
Upon completion, exits with one of the following values:
The directory was successfully changed.
An error occurred. The working directory remains unchanged.
SEE ALSO csh(1), pwd(1), ksh(1), sh-posix(1), sh(1), chdir(2).
STANDARDS CONFORMANCE cd(1)