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Shell Programming and Scripting
read command in while
Post 302282976 by Perderabo on Monday 2nd of February 2009 09:52:57 AM
02-02-2009
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'Morning
vmstat 1 1|sed 1,2d|awk '{printf("%s\n",$1)}'|read var
echo $var
This syntax run on AIX (ksh) but not on linux (bash).
I think that problem is the read command, because the following syntax is ok :
vmstat 1 1|sed 1,2d|awk '{printf("%s\n",$1)}'
Could someone help me!
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LEARN ABOUT MOJAVE
systemd-tty-ask-password-agent
SYSTEMD-TTY-ASK-PASSWORD-AGENT(1) systemd-tty-ask-password-agent SYSTEMD-TTY-ASK-PASSWORD-AGENT(1) NAME
systemd-tty-ask-password-agent - List or process pending systemd password requests SYNOPSIS
systemd-tty-ask-password-agent [OPTIONS...] [VARIABLE=VALUE...] DESCRIPTION
systemd-tty-ask-password-agent is a password agent that handles password requests of the system, for example for hard disk encryption passwords or SSL certificate passwords that need to be queried at boot-time or during runtime. systemd-tty-ask-password-agent implements the Password Agents Specification[1], and is one of many possible response agents which answer to queries formulated with systemd-ask-password(1). OPTIONS
The following options are understood: --list Lists all currently pending system password requests. --query Process all currently pending system password requests by querying the user on the calling TTY. --watch Continuously process password requests. --wall Forward password requests to wall(1) instead of querying the user on the calling TTY. --plymouth Ask question with plymouth(8) instead of querying the user on the calling TTY. --console Ask question on /dev/console instead of querying the user on the calling TTY. -h, --help Print a short help text and exit. --version Print a short version string and exit. EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise. SEE ALSO
systemd(1), systemctl(1), systemd-ask-password-console.service(8), wall(1), plymouth(8) NOTES
1. Password Agents Specification https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents systemd 237 SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)