bash provides many functionalities that sh does not, for instance "process substitution" that you use in your code sample.
You need to output to two files, and paste those, or you need to play dirty tricks, like
Generally, I don't consider using fifo's to be in any way dirty. However, the way you're using one here is unreliable. The successful completion of your approach depends on several factors:
1. The shell's execution environment. If job control is enabled, each background job runs in its own process group. Background process groups may not be able to write to the terminal.
2. Terminal settings. If tostop is enabled (see stty), writes to the terminal by a process not in the foreground process group triggers SIGTTOU signals to all processes in the process group.
3. Process signal masks. If the writing process is blocking or ignoring SIGTTOU, then the signal isn't sent to the process group.
The following approach could be stopped as soon as paste tries to write.
For a more reliable approach, I would suggest using a second fifo:
I wonder if any body can help me with a command i am struggling with. I have a file with around 400 lines in, in a program i have it pulls out each line at a time so that data from the line can be cross referenced with another file. If it finds a match it pulls out a ocde from the second file, this... (5 Replies)
I'm attempting to create a Perl script that will:
Take the contents of the usernames.tmp file
(usernames.tmp is created from an awk one-liner ran against /etc/passwd)
Take one line at a time and pass it to the su command as a users name.
This should go on until there is no more name to... (10 Replies)
Problem with Paste command :)
Hi All,
i need small suggestion in my below script...
i have output in .txt format like below
file1.txt
01111111
02222222
03333333
file2.txt
230125
000012
000002
now i want to merge both the file in xls or csv formate
now i am using the below... (2 Replies)
Hi Unix gurus
I have a file containing 2 coloumns. I would like to do a script which reads the lines and executes a command like this:
command <field1> parameters <field2> some more parameters
Please let me know how you would do this without AWK, SED or any other mini language (for special... (5 Replies)
I have a file which contains 3 fields separated by tabs example
andrew kid baker
I need to swap kid and baker using cut and paste commands how is this to be done?
Thanks (3 Replies)
Hello. I've made a simple script which asks the user to input a hash and then runs a command that replaces the variable $hash with what the user inserted. The ting is that when the programm asks for input I can't paste anything there..! any clues?? :wall: (8 Replies)
Hi,
I want to use paste command in a loop that does it every 6 files. My sample files are like the ones below.
20010101.txt 20010106.txt 20010111.txt
20010116.txt 20010121.txt 20010126.txt
20010131.txt 20010205.txt 20010210.txt
20010215.txt 20010220.txt 20010225.txt
20010302.txt... (4 Replies)
there are lot of files where in mostly all the file contains 2columnsAl,1
Ail,13
Al,3
Al,1
Al,3
Al,2
Al,3
Al,1
Al,1
Al,1
My requirement is i wanted only the second column of every file as a column ony in the base file... I used paste command... but it is not helping as I'm using while... (7 Replies)
Hai ,
When i use paste command in command prompt its giving expected output but not in the script. Below is the example.
$cat file
1
2
3
$cat file1
4
5
6
$paste -d ':' file file1
1:4
2:5
3:6
but when i used the same command in script its giving the output as below :
1
2
3 (3 Replies)
Discussion started by: Subbu123
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)