Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Need to understand the output of last command

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Need to understand the output of last command
# 1  
Old 01-26-2010
Need to understand the output of last command
Code:
root@desktop:~# last reboot | head -1
reboot   system boot  2.6.31-17-generi Tue Jan 26 12:05 - 13:52  (01:46)

What does the last two fields(12:05 - 13:52 (01:46)) of the output mean?
# 2  
Old 01-26-2010
This kind of display normally apply to a user, meaning he logged in at 12:05pm, logged out at 01:52pm and thus stayed logged for 1h and 46min, but it makes little sense for a reboot which is normally reported as a single time event.
# 3  
Old 01-26-2010
I think it means, that your system was rebooted at 12:05 and it was 13:52 when you executed 'last reboot'. 01:46 was the uptime at that moment (with a minute rounding difference).
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Help understand awk command

Help understand awk command This command converts the column values to rows. Command: awk -s1=" " '{S=S?S OFS s1 $0 s1:s1 $0 s1} END{print S}' OFS=, Input_file Example: 1 2 3 is converted to: 1, 2, 3 Can anyone please help me understand this command? Please use code tags when... (1 Reply)
Discussion started by: mohan44
1 Replies

2. Shell Programming and Scripting

Help to understand the command

Hi Gurus, I am new for Unix scripting. below command in one existing script. I am not able to fully understand. please help in below command, I am not able to understand what's {P=1} do thanks in advance awk 'NF==1{$3=$1;$1=L}P&&NF>=3{print $1,$3;L=$1}/^___/{P=1}' FILE (3 Replies)
Discussion started by: green_k
3 Replies

3. Shell Programming and Scripting

Can't understand script output

New to korn shel1 and having an issue. The following is suppose to read the parameter values from files in a source directory and then pass them on to a log file in a different directory, The ArchiveTracker scripts is suppose to call the parameterreader script to exact the parameter values and... (3 Replies)
Discussion started by: bayouprophet
3 Replies

4. UNIX for Advanced & Expert Users

unable to understand the output of TRUSS command

Hi, I am trying to set ulimit for soft stack unlimited, but this is not taking effect, after tracing the ulimit -a unlimited command, the below output was generated, which i am unable to comprehend. Could any one help me with this? prcbap1-r10prod: truss -d ulimit -s unlimited Tue Dec 30... (2 Replies)
Discussion started by: NasirAbbasi
2 Replies

5. Shell Programming and Scripting

Do not understand grep output

In my directory I have two files and one subdirectory. When I run ls -l |grep -v ^d I get the following output: total 8 -rwxrwxrwx 1 qms qms 254 Oct 3 16:00 file1.txt -rwxrwxrwx 1 qms qms 7167 Oct 11 15:46 file2.txt Can you explain what is total 8 if the number of files is 2 and is... (3 Replies)
Discussion started by: rdogadin
3 Replies

6. UNIX for Dummies Questions & Answers

Not able to understand this output

I am hitting this command: dvlna021-(/cm/ims/dev/gds-scheduler/10/app/Software/active/Soft/conf)->ls -lrt gds_userenv_* This is the output lrwxrwxrwx 1 aimse was 65 Jul 31 12:56 gds_userenv_scheduler_2.ksh -> /cm/ims/dev/gds-scheduler/10/app/conf/gds_userenv_scheduler_2.ksh ... (2 Replies)
Discussion started by: Nsharma3006
2 Replies

7. UNIX for Dummies Questions & Answers

Not able to understand the output of w command

I have taken putty session of a server from two separate machines namely HOST1(3 sessions) and HOST2(1 Session) . However w command says there are 5 users Confused over the output any clue will be appreciated. # w 09:29:36 up 34 days, 15:48, 5 users, load average: 0.62, 4.33, 8.16 USER ... (3 Replies)
Discussion started by: pinga123
3 Replies

8. UNIX for Dummies Questions & Answers

Unable to understand ps output.

I m executing ps command and sorting it according to memory usage. Please find the output of the command. # ps aux --sort pmem USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 2060 624 ? Ss 01:54 0:00 init root 2 0.0... (1 Reply)
Discussion started by: pinga123
1 Replies

9. Shell Programming and Scripting

I can't understand sed error output.

Hey forum, I have a problem with a script what used to work, but suddenly is not working anymore. I have been trying different things for an hour now and I give up :D . #!/bin/sh asukoht=`pwd` template=$1 for values in... (4 Replies)
Discussion started by: mario8eren
4 Replies

10. Red Hat

Understand output of "free" command

Hi Friends, I am really confused with the output of "free" command on redhat linux. I can see caching and buffer output on two different areas on the output. Please let me know whats the difference of these two different outputs. Here I am pasting the command output of my server. # free... (3 Replies)
Discussion started by: arumon
3 Replies
Login or Register to Ask a Question