Shell Programming and Scripting

Now - OpenVMS definitely is NOT "almost same to other other operating systems." Refer to their help system (unfortunately it's quite some time so I can't remember the correct syntax) about what options and regexes they accept.



Do you have access to GNU sed on your system?

You could try the -r option, which on several systems is equivalent to -E.

Applied to your a.txt file from post#6 on Ubuntu 18.04:

Code:

sed  -E '/^[0-9]{8}(0[1357]|1[01])/d' file
000000000000
433483433339
167750000010
sed  '/^[0-9]\{8\}\(0[1357]\|1[01]\)/d' file
000000000000
433483433339
167750000010

EDIT: on FreeBSD 9.0-RELEASE, the BRE sed fails, but

Code:

sed  -E '/^[0-9]{8}(0[1357]|1[01])/d' file
000000000000
433483433339
167750000010

This works on my FreeBSD:

Code:

sed  '/^[0-9]\{8\}0[1357]/d; /^[0-9]\{8\}1[01]/d' file

Just using standard sed features and avoiding cases where systems allowing EREs or BREs make a difference, both of the following seem to also do what you want:

Code:

sed -e '/^........0[1357]/d' -e '/^........1[01]/d' a.txt

and:

Code:

sed '/^........0[1357]/d;/^........1[01]/d' a.txt

But, I have no experience with openVMS, so I can't say whether or not either of these will work there.

sorry the browswer not putting code tags around the code when I click on button , so I am adding them manually hope it works.
can someone help me on my sed command please?

I am using sun solaris and Linux , what I want is SED to print any string (or output it to a file preferably) that does not have either "01","03","05","07","10" or "11" on the 9th and 10th position .
e.g from the file below I only want these three lines

Code:

433483433339
167710001710
167730600000

Code:

$cat a.txt
 000000001000
 433483433339 <<< print this since 33 is at 9th and 10th pos
 121121211100 
 167710001710 <<< print this since 17 is at 9th and 10th pos
 167735250310
 167735260510
 167735280710
 167730600000 <<< print this since 00 is at 9th and 10th pos

------ Post updated at 10:07 AM ------



awesome this one worked

------ Post updated at 10:08 AM ------

how does this command works though .. I understand each parts but how the output of one gets piped to the other?

Code:

sed -e '/^........0[1357]/d' -e '/^........1[01]/d' a.txt

There is a single sed command invocation here containing two editing commands. No piping is involved. The first editing command deletes every line that contains 01, 03, 05m or 07 as the 9th and 10th characters on a line. If that command didn't delete the line, the 2nd editing commands deletes every line that contains 10 or 11 as the 9th and 10th characters on a line. If neither of those editing commands deleted the input line, the default sed action is to copy the input line to standard output.

When there are two editing commands to be performed by one invocation of sed, each of those editing commands can be introduced as separate -e option arguments (as shown in the first sed command above).

Many sed commands (including the delete command) can be entered as a single -e option argument by separating them with a semicolon. And, if only one editing command argument is needed, including the actual -e option is optional (as shown in the second sed command above).