UNIX for Dummies Questions & Answers

Firstly the script will execute as sh ./filename BUT because the script executes in a sub-shell a subsequent echo $APT_ORCHHOME will not show the new value of the environement variable.
When executed as . ./filename the script executes in the current environment and you can see the change. This is the same way your profile works.

Had to look really carefully to find out how you managed to execute this script at all. Because you are not the owner of the script and you are not in the same group as the script you can only read the script because it has read permissions for "other". Normally a shared script would have permissions 755 (but yours has 754).
Because there are no execute permissions for "other" that is why it failed to execute as ./filename.
When you tried to execute the script as just filename that failed to find the file because the directory is not in $PATH. However even if the directory was in $PATH it would still fail because there is no execute permissions for "other".

So! When you precede the command with either a real "sh" (sh filename) or are already running "sh" (. ./filename) you cannot automatically start a shell to execute a script file unless your account has execute permissions for that script file.

hi , can you please help

Amongst my reply, the only bit that matters is:

The rest of the issues with executing the script are due to the permissions of the file or due to fact that the directory containing the script is not in $PATH. This is actually irrelevant as . ./filename is the only sensible way to execute the script if you want the environment variable to be set in the current environment. In some modern Bourne-like Shells you may find the "source" command which has the same effect but it is not a standard command and is not valid in "ksh".

lemme guess... you don't own the file. you aren't in the group.
therefore, you do not have execute permission on this file.

Code:

sh ./file_name

... should work.

hi , i really see i have a long way to go in unix regarding forking , subshell and those kind of stuff , can someone tell me where i can get the information regarding all this , as a beginner where would it be good to start

---------- Post updated at 01:29 AM ---------- Previous update was at 12:53 AM ----------

Code:

anumit01@ldoh0010isphn01:/opt/IBM/dev/APP/InformationServer/Server/DSEngine> id dsadm
uid=8293(dsadm) gid=2281(dstage) groups=2281(dstage),10009(IA),1006(db2ctrl),2283(dsadm1),6550(iauser),5000(loadl),3344(mft),2001(mqm),668(sshallow),1001(hrtrans),10002(etldev),1000041(hrdw-dev),1002000(hrt)
anumit01@ldoh0010isphn01:/opt/IBM/dev/APP/InformationServer/Server/DSEngine> id anumit01
uid=1000401(anumit01) gid=1000000(u-users) groups=1000000(u-users),1000151(etldeploy),10002(etldev),1000143(etltestdeploy)

also the owner of the file which i am trying to execute and my user id sshare a same group , does that not mean i belong to that group , so that i can execute the files

Please re-phrase the question in common English. I really don't understand the question.


My understanding of the question (might be wrong):
If you can read the script file, you can execute the script file with sh ./scriptname. In order to execute the script automatically just by typing the name of the script your username must be in a group which has execute permissions for that script.

id dsadm

Code:

uid=8293(dsadm) gid=2281(dstage) groups=2281(dstage),10009(IA),1006(db2ctrl),2283(dsadm1),6550(iauser),5000(loadl),3344(mft),2001(mqm),668(sshallow),1001(hrtrans),10002(etldev),1000041(hrdw-dev),1002000(hrt)

here there is a group 10002(etldev).this is the list of groups to which the owner of the script belong

now my id shows

Code:

gid=1000000(u-users) groups=1000000(u-users),1000151(etldeploy),10002(etldev),1000143(etltestdeploy)

so me and owner of the script share a common goroup and file is executable for group , so i should be able to execute it this way (./scriptname ) right ? but i am not able to execute without sh . please help me