Visit Our UNIX and Linux User Community

How to pipe command

Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users How to pipe command
# 1  
Old 03-20-2002
How to pipe command

Hi All,

I want to create a command that executes a text editor with the most recent file in the current current directory.

So a good start to achieve this is :

ls -lrt | cut -c55- | tail -1

which provides the name of the most recent file in a directory

The problem is to pipe the result of this command with the text editor command (suppose dtpad).

So my question is : does it exist a way to make something like

ls -lrt | cut -c55- | tail -1 | dtpad XXXX

where XXXX is a variable or a command to force the dtpad command to take as parameter the result of the pipe

Thanks by advance,
# 2  
Old 03-20-2002
You don't say what version of unix your on but try

dtpad `ls -lrt|cut -c55-|tail -1`
# 3  
Old 03-20-2002
Use 'find' to obtain the most recent files.

Ex: 'find $YOUR_DIR -mtime -5' will provide files with last modified date of less than 5 days....

then use dtpad as suggested by kevin.
# 4  
Old 03-20-2002

Originally posted by Kevin Pryke
You don't say what version of unix your on but try

dtpad `ls -lrt|cut -c55-|tail -1`

Cool that works...

The unix version I use is SunOS 5.5.1 (result of uname -sr)

# 5  
Old 03-20-2002
alternate way, use awk

here is an alternate way that doesn't depend on a certain length to cut from-to.

It may be easier for you, I know it is for me. Also, you can use this principle in scripting as well.

dtpad `ls -lrt | awk '{ print $NF }' | tail -1`

This captures the last field and also gets rid of and leading or trailing spaces as well.

BTW, the $NF will always pull the last field. This is especially good if you have a line with more than 9 delimited fields, because $0 will print the whole line with the "awk" command.

UNIX is so great, we can do the same things in some many different ways!



Previous Thread | Next Thread
Test Your Knowledge in Computers #403
Difficulty: Easy
Cygwin is a POSIX-compatible environment that runs natively on Microsoft Windows.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Would pipe work better with this command

Hi again, have a script that I would like run, but before I can run it I need to strip out the windows \r end of lines. I have put the command into a text file and set the command to run every 10 seconds the coomand I use to do this is while sleep 10; do... (15 Replies)
Discussion started by: Paul Walker
15 Replies

2. Shell Programming and Scripting

Pipe command to script

Hello to all, Having a ruby script that works when an argument is given in command line in this way: ruby script.rb input_to_ruby To accept arguments as input, inside the ruby script has input_to_ruby is generated by another command, so I need to create first input_to_ruby... (6 Replies)
Discussion started by: Ophiuchus
6 Replies

3. Shell Programming and Scripting

Single command pipe

Single command to ls all the files inside a particular directory hierachy and output this to a file and open this in a vim file so that i can use gf command in vim to browse through all the files inside this hierachy. eg : dir1/dir2 and dir1/dir3 dir2 and dir3 contain the files i need... (7 Replies)
Discussion started by: dll_fpga
7 Replies

4. Shell Programming and Scripting

pipe in command

Hello, I try to concatenate a command to execute. Sadly it throws an error. #!/bin/bash cd / cmd="find -name *.txt | awk '{ printf "FILE: "$1; system("less "$1);}' | egrep 'FILE:|$1'" echo "1." $($cmd) echo "2." $("$cmd") echo "3." `$cmd` echo "4." `"$cmd"`1.&3. 'find: paths must... (2 Replies)
Discussion started by: daWonderer
2 Replies

5. UNIX and Linux Applications

Tee with pipe command.

cat work.txt M|324324|32424|3431 M|324324|32424|3431 N|324324|32426|3432 N|324324|32424|3434 M|324324|32424|3435 cat work.txt | tee $( grep '^M' > m.txt ) | $( grep '^N' > n.txt ) cehpny00:/home01/sr38632 $ cat m.txt M|324324|32424|3431 M|324324|32424|3431 M|324324|32424|3435 ... (2 Replies)
Discussion started by: rsampathy
2 Replies

6. Shell Programming and Scripting

pipe grep command

Hi all, Can someone help me with the following problem. I am executing the following command: (search for occurences of 'error' in files that match cl-*.log expression) > grep -cw -i --max-count=1 'error' cl-*.log this command outputs: cl-apache.log:1 cl-apache_error.log:1... (3 Replies)
Discussion started by: epro66
3 Replies

7. UNIX for Advanced & Expert Users

unix command pipe

I am pretty new to UNIX. My client has a requirement where in a directory we have some files with somewhat similar name like test_XX.txt, test_XY.txt, test_XZ.txt, test_ZZ.txt, test_ZY.txt, test_ZX.txt, test_YY.txt......Out of these files few files have 0 bytes. Is there a way where we can go... (7 Replies)
Discussion started by: RubinPat
7 Replies

8. UNIX for Dummies Questions & Answers

Pipe in command string

Hi, Can't you have a pipe in a command string ? If I try the following I get errors. Why ? > cmd="ls -lrt | grep xyz" > $cmd |: No such file or directory grep: No such file or directory xyx: No such file or directory Thanks in advance Hench (3 Replies)
Discussion started by: hench
3 Replies

9. UNIX for Dummies Questions & Answers

How can I use pipe command ?

Hi My friends I have used this command to find files are modified within the past 24 hours and then many files are shown but I want transfer all these files to special directory by using pipe . can any one tell me what is the next step ? (11 Replies)
Discussion started by: bintaleb
11 Replies

10. UNIX for Dummies Questions & Answers

pipe command

current dir : /home/sales ls -l abc.txt 17th aug bcd .txt 16t oct ------- ------ Total files : 100 if i want to move only those files dated 17 aug into another sub directory /home/sales/texas how do i pipe the result of 'ls' command to a 'mv' command (1 Reply)
Discussion started by: zomboo
1 Replies

Featured Tech Videos