Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu

How to run a script at background and How to monitor and how to shedule a job using crontab easily ?

-

 By giving" &" at end of script called running background

                            (OR)

Set in task scheduler or crontjob.

Using at command you can schedule a job to run at a particular date and time. For example, to execute the backup script at 5 a.m tomorrow, do the following.

$ at -f backup.sh 5 am tomorrow

you can run the shell script Following methods at backgroundly:

. script.sh &
./script.sh &
sh script.sh &
       (OR)
nohub sh script.sh &
nohub ./script.sh &
nohub .script.sh &

Note: hup is a hangup signal... nohup - no hangup... so if we give  nohup script.sh & ... it starts progressing script.sh in back ground... that the subsequent logout or session disconnection does not stop..

Note: & Stands for running background

After running this give  "ctrl+z" in background one id will be displayed as running that is called  process_ID using that PID we can adjust priority for that particular jobs.

jobs -l (will display that process id which is running )

Note: jobs will be displayed only the running and stopped jobs for only that session

top -c is also one of option -c means which display the commands. But This will be displayed whole server jobs and services not for session only


if you want commands

screen Sh script.sh

Here are the steps you can follow to run a process in screen, detach from the terminal, and then reattach.

From the command prompt, just run screen. This will give you a new subshell.

Run your desired program

Detatch from the screen session using the key sequence Ctrl-a Ctrl-d (note that all screen key bindings start with Ctrl-a). This will drop you back to your original shell and display a message "[detached]", indicating that the screen session is still running.

You can then list the available screen sessions by running "screen -list"

You can reattach to this screen session by running "screen -r". Once reattached, you will be able to take off where you left off and see any output that was printed to the screen during the time that you were detached. If you have multiple screen sessions, then you can specify the tty name (as displayed by screen -list) as an argument to screen -r to attach to a particular session.

Comments

Post a Comment

Popular posts from this blog

VMWARE WORKSTATION 3,4,5,6,7,8,9,10,11,12,14,15...etc LICENSE KEYS COLLECTION

-
Image
Below tutorialdba.com collected and sorted out hundreds of universal License Keys for all major versions of VMware Workstation Pro (not for VMware Workstation Player) 4.x, 5.x, 6.x, 7.x, 8.x, 9.x, 10.x, 11.x, 12.x and v14.x on Windows and Linux platforms (support both 32-bit and 64-bit operating system) in this single post. Besides, we also provide some license keys for VMware other projects. Just enjoy and share them. // 4~14 Universal License Keys // Version License Keys VMware Workstation VMware Workstation 4.x.x ZHDH1-UR90N-W844G-4PTN6 G1NP0-T88AL-M016F-4P8N2 ZC14J-4U16A-0A04G-4MEZP J1WF8-58LDE-881DG-4M8Q3 VMware Workstation 5.x.x LUXRM-WP0DN-A256U-4M9Q3 DJXDR-NDT27-Y2NDU-4YTZK DA925-HP80U-Z8HDC-4WXXP 3KW2W-AYR2C-88M6F-4MDQ2 VMware Workstation 6.x.x A0E8R-YUDFV-6AK2F-4GAN2 CRX0D-VWL0V-7CJ6C-46C7A NA8RX-QPNDU-D2LA9-4WAZL 1H4WM-N21FZ-7GK2A-44U5U 6AJ6N-THY2P-42KEF-4WTFG FK8R9-LPCDT-88H4Y-4WRN3 KAR8R-T8MAL-K8J6A-4WDXQ YJEKW-JMFF4-YA1DC-4WTQP WC5FW-V0CFX
Read more

How to find the server is whether standby (slave) or primary(master) in Postgresql replication ?

-
Method 1 You can check the mode of the server using "pg_controldata". [pgsql@test~]$ pg_controldata /usr/local/pgsql/data84/ Database cluster state: in archive recovery --> This is Standby Database Database cluster state: in production --> This is Production Database [Master] Method 2 You can use pg_is_in_recovery() which returns True if recovery is still in progress(so the server is running in standby mode or slave) postgres=# select pg_is_in_recovery(); pg_is_in_recovery ------------------- t (1 row) If Return    false   so the server is running in primary mode or master postgres=# select pg_is_in_recovery(); pg_is_in_recovery ------------------- f (1 row)
Read more

How to Configuration UDEV SCSI Rules In Oracle Linux 5, 6 and 7

-
For Oracle Automatic Storage Manager (ASM) to use disks, it needs to be able to identify the devices consistently and for them to have the correct ownership and permissions. In Linux you can use ASMLib to manage these tasks, but it is seen as an additional layer of complexity and has never really gained any popularity. Instead, many people use the Linux device manager "udev" to perform these tasks. This article presents a brief overview of setting up udev rules with respect to disks for use with ASM in Oracle 11g. The examples are all done using Oracle Linux 5, 6 and 7, so they will be consistent with RHEL and CentOS 5, 6 and 7. Background Essentially, what udev does is apply rules defined in files in the "/etc/udev/rules.d" directory to the device nodes listed in the "/dev" directory. The rules can be defined in a variety of ways, but what we need to do is identify the device and say what we want udev to do with it. In this case I know all my disk
Read more

aspell

-
aspell --version (return code: 0) @(#) International Ispell Version 3.1.20 (but really Aspell 0.60.7-20110707) aspell --help (return code: 0) Aspell 0.60.7-20110707. Copyright 2000-2011 by Kevin Atkinson. Usage: aspell [options] <command> <command> is one of: -?|usage display a brief usage message help display a detailed help message -c|check <file> to check a file -a|pipe "ispell -a" compatibility mode list produce a list of misspelled words from standard input [dump] config dumps the current configuration to stdout config <key> prints the current value of an option soundslike returns the sounds like equivalent for each word entered munch generate possible root words and affixes expand [1-4] expands affix flags clean [strict] cleans a word list so that every line is a valid word -v|version prints a version line munch-list [simple] [single|mu
Read more

Linux ctime,mtime,atime,cmin,amin,mmin

-
Unix and therefore Linux uses (at least) 3 different timestamps on modern file systems (see File systems Table for info) in order to date any files. You can use these information to search for files, check logs, manage your backup and more… that’s why it is a must  for any sysadmin to clearly understand this mechanism. This page is aimed at exposing basics knowledge to understand and use files timestamps. 1) Definitions Here are some time stamps related definitions. 1.1 atime This is the Access time : atime is updated whenever file’s data is accessed (a read, write or any other access); this could be done by a system process, interactively by CLI or by a script. 1.2 mtime This is the Modification time : mtime is updated whenever the file’s content changes. This time stamp is not updated by a change of files permissions (e.g : through a chown command). It is usually used for tracking the file content changes (see the Linux time related tools section below for more inf
Read more