Today (Saturday) We will make some minor tuning adjustments to MySQL.

You may experience 2 up to 10 seconds "glitch time" when we restart MySQL. We expect to make these adjustments around 1AM Eastern Daylight Saving Time (EDT) US.


2 way to save a log file, what is the difference?


Login or Register to Reply

 
Thread Tools Search this Thread
# 1  
2 way to save a log file, what is the difference?

Hello good day

I would like to know what is the difference between these two commands please
both warrant the output in the file

Code:
echo " ORACLE_SID   : $ORACLE_SID"     | tee -a $logfile

echo " ORACLE_SID   : $ORACLE_SID"     > $logfile

# 2  
The -a options of tee appends the output to the file rather than overwriting the file.

Your > $logfile code overwrites the file.

There may be more subtle differences I am not familiar with off the top of my head.
This User Gave Thanks to Neo For This Post:
# 3  
tee works like a plumber's T-piece that allows gas or water flow split into two directions. tee accepts input on stdin and, on top of writing it to stdout, also writes / appends to one or several additional files. Your first version will append to a log file (create if non-existent) but also print to screen (or whatever stdout is at the time the snippet runs).
This User Gave Thanks to RudiC For This Post:
Login or Register to Reply

|
Thread Tools Search this Thread
Search this Thread:
Advanced Search

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Save value from output of Corestat and save in a list for each core

I am trying to modify the "corestat v1.1" code which is in Perl.The typical output of this code is below: Core Utilization CoreId %Usr %Sys %Total ------ ----- ----- ------ 5 4.91 0.01 4.92 6 0.06 ... (0 Replies)
Discussion started by: Zam_1234
0 Replies

2. Shell Programming and Scripting

Need Script to ZIP/SAVE & then DELETE Log file & send a mail conformation for any error

ENVIROMENT Linux: RHEL 6.4 Log Path: /usr/iplanet/servers/https-company/logs Log Format: user.log.03-15-2015 I have log4j log rotation enabled rotating files on a daily basis. The rotated logs are NOT compressed & are taking up too much space. I need a script that will run daily that... (1 Reply)
Discussion started by: admin_job_admin
1 Replies

3. Shell Programming and Scripting

Check/Parse log file's lines using time difference/timestamp

I was looking at this script which outputs the two lines which differs less than one sec. #!/usr/bin/perl -w use strict; use warnings; use Time::Local; use constant SEC_MILIC => 1000; my $file='infile'; ## Open for reading argument file. open my $fh, "<", $file or die "Cannot... (1 Reply)
Discussion started by: cele_82
1 Replies

4. Shell Programming and Scripting

Save log data in excel sheet

Hello, I have the following data format in a log file : a : x1 b : x2 c : x3 d : x4 -------- a : x5 b : x6 c : x7 d : x8 so the same fields ( a ,b ,c,d) repeated many times in the same log file but with different "x" values (x5,x6,x7,x8). I need a script to save this data in an... (6 Replies)
Discussion started by: mm00123
6 Replies

5. Red Hat

Need Script to ZIP/SAVE & then DELETE Log file & DELETE ZIPS older than 12 months

ENVIROMENT Linux: Fedora Core release 1 (Yarrow) iPlanet: iPlanet-WebServer-Enterprise/6.0SP1 Log Path: /usr/iplanet/servers/https-company/logs I have iPlanet log rotation enabled rotating files on a daily basis. The rotated logs are NOT compressed & are taking up too much space. I... (7 Replies)
Discussion started by: zachs
7 Replies

6. Shell Programming and Scripting

cut lines from log file and save it another file

Dears, i want cut the lines from a log file. Example of the log file as follows.. May 27, 2011 5:54:51 PM com.huawei.ivas.utilities.sm.client.SMDeliverContrUtil isDeliverSM FINE: May 27, 2011 5:54:51 PM com.huawei.ivas.utilities.sm.client.SMUtil addSysUpMsgLog INFO: . The message content... (1 Reply)
Discussion started by: tonypalokkaran
1 Replies

7. Shell Programming and Scripting

Save cURL verbose output to file or do it like browser "save as.."

hi there ! i have exactly the same problem like this guy here https://www.unix.com/shell-programming-scripting/127668-getting-curl-output-verbose-file.html i am not able to save the curl verbose output.. the sollution in this thread (redirecting stderr to a file) does not work for me.... (0 Replies)
Discussion started by: crabmeat
0 Replies

8. Shell Programming and Scripting

save every line in log file with matched string

i have been doing this script to match every line in a current log file (access_log) with strings that i list from a path (consist of 100 of user's name ex: meggae ).. and then make a directory of every string from the text file (/path/meggae/) --->if it matched.. then print every line from the... (3 Replies)
Discussion started by: meggae
3 Replies

9. Shell Programming and Scripting

To find the time difference between two lines of the same log file

Hello Friends, I want to write a script for the following: nlscux62:tibprod> grep "2008 Apr 30 01:" SA_EHV_SPEED_SFC_IN_03-SA_EHV_SPEED_SFC_IN_03-2.log | grep -i post | more 2008 Apr 30 01:01:23:928 GMT +2 SAPAdapter.SA_EHV_SPEED_SFC_IN_03-SA_EHV_SPEED_SFC_IN_03-2 Info AER3-000095 IDOC... (2 Replies)
Discussion started by: satyakam
2 Replies

10. UNIX for Dummies Questions & Answers

Asking on how to save the display log

Hi, like to ask if we try to execute s .sh script and in the script there are sql script and when we run the .sh script only the screen will display out whether it is successful ,those that i did not append to a file will be shown on screen instead of the file. How do i save what ever it... (1 Reply)
Discussion started by: blueberry80
1 Replies

Featured Tech Videos