Sponsored Content
Full Discussion: Why is ./ sometimes needed?
Top Forums Shell Programming and Scripting Why is ./ sometimes needed? Post 303029669 by wisecracker on Wednesday 30th of January 2019 10:16:08 AM
Old 01-30-2019
Quote:
Originally Posted by Xubuntu56
I appreciate the help; I've learned a lot!

Here`s the original script, which I did not write.



Code:
#!/bin/bash
 

# Proper header for a Bash script
# cleanup2: improved
# Run as root, of course.
# Insert code here to print error message and exit if not root.

LOG_DIR=/var/log
# Variables are better that hard-coded values.
cd $LOG_DIR

cat /dev/null > messages
cat /dev/null > wtmp

echo "Logs cleaned up."

exit    #  The right and proper method of "exiting" from a script.
        # A bare "exit" (no parameter) returns the exit status
        #+ of the preceding command.

IS THAT IT, (and needs to be run from root)?
Why use:
Code:
cat /dev/null > messages
cat /dev/null > wtmp

When:
Code:
: > messages
: > wtmp

......is much simpler.
Useless use of cat?
No disrespect to you Xubuntu56, you are innocent of this one...
BUT THAT........
........guys was the improved version, what was the original like I wonder!

Last edited by wisecracker; 01-30-2019 at 11:29 AM..
This User Gave Thanks to wisecracker For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Help is needed

Hi I'm trying to print a directories struct tree that will look like this: A _a _b _B __c __d __C ___e B _a _b I'm doing a recursion, but how can I know how much space is needed before printing after the recursion? (3 Replies)
Discussion started by: abcde
3 Replies

2. UNIX for Dummies Questions & Answers

Help needed

Hello I am a newbie and want to learn unix . Does unix and linux are one and same. I have red hat linux cd but i want to take advice from some one wheather unix and linux are same. If not ,where i'll get a Unix os setup and how i'll install it. If linux would do then how should... (3 Replies)
Discussion started by: hunter87
3 Replies

3. UNIX for Dummies Questions & Answers

Help needed

HI can any one help me with the appropriate answers for the below: 1.Enter an # before a command and press .what do you see,and how do you think you can take advantage of the behaviour? 2.Is tar -cvfb20foo.tar*.c legitimate or not.will this command work without the - symbol? 3.The command... (1 Reply)
Discussion started by: akhil1460
1 Replies

4. AIX

Little help needed.

Hello, I am quite new to AIX, but have Linux experience. Iam facing a peoblem with AIX 5.2 running on a 43p Model 150 (RS6000). I tried everyting and i cant have the network to run properly. :confused: /etc/hosts looks like this: 127.0.0.1 loopback localhost 192.168.XXX.XXX... (5 Replies)
Discussion started by: Netghost
5 Replies

5. UNIX for Dummies Questions & Answers

little help needed..

hi everyone i'm a noob trying to learn unix language.. but seems like i got no leads on how to start.. i'm playing with the 'ps' command.. i'm trying to show the pid, ppid, username, command, cpu utilization (in desc order), process start time and process status.. all in a command.. am i able... (3 Replies)
Discussion started by: hilofat
3 Replies

6. UNIX for Dummies Questions & Answers

Help needed please.

i've been given an assignment to Write a system utility called recycle that satisfies the following requirements as they might be displayed in a UNIX/Linux man page: NAME recycle - stores files in a recycle bin SYNOPSIS recycle ... DESCRIPTION Recycle is a replacement for the... (3 Replies)
Discussion started by: jerryboy78
3 Replies

7. Shell Programming and Scripting

Help needed ....

Hi... I have a folder /home/data ;where some files are present. aaa_asas.txt bbb_xxx.txt ccc_xsxas.txt ddd_sa2esa.txt ------ Also I have a file which is as follows.(/home/file1) cat /home/file1 aaa you bbb are ccc very ddd good -------- now I want to rename all the files in the folder... (7 Replies)
Discussion started by: newbee1
7 Replies

8. Shell Programming and Scripting

help needed...

Guys, There is a file where there are 1000s of records. In the file if some condition satisfies in a certain TAB record (TAB would be first 3 digits of a certain record) then move TAB and all the records (or lines) after TAB to new_file, until another TAB record is encountered in the same... (1 Reply)
Discussion started by: Prat007
1 Replies

9. Shell Programming and Scripting

Help Needed

please reply for this https://www.unix.com/shell-programming-scripting/111493-cutting-lines.html its really urgent (1 Reply)
Discussion started by: jojo123
1 Replies

10. Shell Programming and Scripting

Help needed

First of all, let me state that I am a windows admin. I have a windows share mounted to /mnt/server I need a script that will either login as sudo or perform commands with sudo rights. I need the script to copy all of the users /home folders to the mounted windows share. Now If I can... (2 Replies)
Discussion started by: EricM
2 Replies
GIT-MERGE-INDEX(1)						    Git Manual							GIT-MERGE-INDEX(1)

NAME
git-merge-index - Run a merge for files needing merging SYNOPSIS
git merge-index [-o] [-q] <merge-program> (-a | [--] <file>*) DESCRIPTION
This looks up the <file>(s) in the index and, if there are any merge entries, passes the SHA-1 hash for those files as arguments 1, 2, 3 (empty argument if no file), and <file> as argument 4. File modes for the three files are passed as arguments 5, 6 and 7. OPTIONS
-- Do not interpret any more arguments as options. -a Run merge against all files in the index that need merging. -o Instead of stopping at the first failed merge, do all of them in one shot - continue with merging even when previous merges returned errors, and only return the error code after all the merges. -q Do not complain about a failed merge program (a merge program failure usually indicates conflicts during the merge). This is for porcelains which might want to emit custom messages. If git merge-index is called with multiple <file>s (or -a) then it processes them in turn only stopping if merge returns a non-zero exit code. Typically this is run with a script calling Git's imitation of the merge command from the RCS package. A sample script called git merge-one-file is included in the distribution. ALERT ALERT ALERT! The Git "merge object order" is different from the RCS merge program merge object order. In the above ordering, the original is first. But the argument order to the 3-way merge program merge is to have the original in the middle. Don't ask me why. Examples: torvalds@ppc970:~/merge-test> git merge-index cat MM This is MM from the original tree. # original This is modified MM in the branch A. # merge1 This is modified MM in the branch B. # merge2 This is modified MM in the branch B. # current contents or torvalds@ppc970:~/merge-test> git merge-index cat AA MM cat: : No such file or directory This is added AA in the branch A. This is added AA in the branch B. This is added AA in the branch B. fatal: merge program failed where the latter example shows how git merge-index will stop trying to merge once anything has returned an error (i.e., cat returned an error for the AA file, because it didn't exist in the original, and thus git merge-index didn't even try to merge the MM thing). GIT
Part of the git(1) suite Git 2.17.1 10/05/2018 GIT-MERGE-INDEX(1)
All times are GMT -4. The time now is 10:02 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy