So, i take it, this is because "[" is a shell builtin. (Which it is indeed - i had the wrong impression that "[" is external and "[[" is the builtin, but i learned otherwise through experiment. In fact "[" is a builtin and "[[" is a reserved word, according to my system shell on AIX, a ksh88.)
This seems to be in line with the following analogous lines, where "x" and "$x" can be used interchangeably:
I wonder how the parsing process of the ksh works so that this is only the case for integers (or - for the shell obviously being the same - strings which evaluate to integers). One would think that variables either get expanded or not, but it would not depend on their content if they are.
hi all
i m working in a company ...and i have to migrate a C application running on SCO-UNIX to Red hat linux.
can anybody tell me what is the difference between C commands and shell scripting on SCO-UNIX and LINUX.
best regards
harsh (3 Replies)
I am trying to set some environment variables in a shell script which is written in Kshell. I am invoking this script in .profile. The problem is envirnment variables are set within the script but after exiting the script those are gone. I don't have any problem with If I have Kshell as my default... (0 Replies)
Dear All,
What points should i keep in mind while migrating scripts from HP-UX to AIX.
Are there any notes available for this?
cheers,
vishal (1 Reply)
Hi All,
I am currently facing new problem of migrating C(c language) application from AIX machine to Linux machine. We are using GCC to compile the source code..
But facing with the compilation issues, with lot of GCC C libs differing between AIX box to Linux box...
Pls help me... (1 Reply)
Hi All,
I am currently facing new problem of migrating C(c language) application from AIX machine to Linux machine. We are using GCC to compile the source code..
But facing with the compilation issues, with lot of GCC C libs differing between AIX box to Linux box...
Pls help me... (1 Reply)
We are changing our OS from HP-Unix 11 to Linux Red Hat. We have few k- shell, c - shell and sql scripts which are currently running under HP-Unix 11. Will these scripts work on LINUX as it is? or we need to do any code changes?IS there anyone who have done this kind of migration before?Thanks for... (2 Replies)
We have certain number of scripts that run on AIX server using ksh.
Now that we migrate these scripts to Linux servers.
We need to know what are the changes that we have to perform in script to make it compatible to run on Linux.
Say like in our Unix -AIX "print" command worked.
But that did... (6 Replies)
I'm New to AIX / VIOS
We're doing a FC switch cutover on an ibm device, connected via SAN.
How do I tell if one path to my remote disk is lost? (aix lvm)
How do I tell when my link is down on my HBA port?
Appreciate your help, very much! (4 Replies)
Hi,
recently we have migrated our current AIX server to Linux, we have lot of shell script, few of them are FTP scripts.
we have copied the complete AIX file system to linux 7.2 as it is.
could you please highlight what are the things we need to look into it .
in AIX we are using .netrc to... (3 Replies)
Discussion started by: Riverstone
3 Replies
LEARN ABOUT DEBIAN
rbash
RBASH(1) General Commands Manual RBASH(1)NAME
rbash - restricted bash, see bash(1)RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO bash(1)GNU Bash-4.0 2004 Apr 20 RBASH(1)