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Shell Programming and Scripting
Completey new to scripting, question/help?
Post 302945334 by xdawg on Thursday 28th of May 2015 11:41:36 AM
05-28-2015
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hi all,
I am writing a script and beginner in shell scripting. I have tried the below script. could you please check and let me know whether the below scirpt is correct.
Unix details : HP Unix
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HTS40002.W1978.PROM
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LEARN ABOUT DEBIAN
lastlog
LASTLOG(8) System Management Commands LASTLOG(8) NAME
lastlog - reports the most recent login of all users or of a given user SYNOPSIS
lastlog [options] DESCRIPTION
lastlog formats and prints the contents of the last login log /var/log/lastlog file. The login-name, port, and last login time will be printed. The default (no flags) causes lastlog entries to be printed, sorted by their order in /etc/passwd. OPTIONS
The options which apply to the lastlog command are: -b, --before DAYS Print only lastlog records older than DAYS. -h, --help Display help message and exit. -R, --root CHROOT_DIR Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory. -t, --time DAYS Print the lastlog records more recent than DAYS. -u, --user LOGIN|RANGE Print the lastlog record of the specified user(s). The users can be specified by a login name, a numerical user ID, or a RANGE of users. This RANGE of users can be specified with a min and max values (UID_MIN-UID_MAX), a max value (-UID_MAX), or a min value (UID_MIN-). If the user has never logged in the message ** Never logged in** will be displayed instead of the port and time. Only the entries for the current users of the system will be displayed. Other entries may exist for users that were deleted previously. NOTE
The lastlog file is a database which contains info on the last login of each user. You should not rotate it. It is a sparse file, so its size on the disk is usually much smaller than the one shown by "ls -l" (which can indicate a really big file if you have in passwd users with a high UID). You can display its real size with "ls -s". FILES
/var/log/lastlog Database times of previous user logins. CAVEATS
Large gaps in UID numbers will cause the lastlog program to run longer with no output to the screen (i.e. if in lastlog database there is no entries for users with UID between 170 and 800 lastlog will appear to hang as it processes entries with UIDs 171-799). shadow-utils 4.1.5.1 05/25/2012 LASTLOG(8)