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Top Forums Shell Programming and Scripting I have two commands “ls -h” and “ls -ltr”. How do i make sure “ls -ltr” is run after “ls -h” is suc Post 302960473 by balajesuri on Monday 16th of November 2015 06:23:24 AM
Old 11-16-2015
Exit status of last run command is stored in a special variable $?. Read this link , and see how you can use this to suit your purpose. Let us know what you could come up with.
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ED(1)                                                              User Commands                                                             ED(1)

NAME
Ed - line-oriented text editor SYNOPSIS
ed [options] [file] DESCRIPTION
GNU Ed - The GNU line editor. OPTIONS
-h, --help display this help and exit -V, --version output version information and exit -G, --traditional run in compatibility mode -l, --loose-exit-status exit with 0 status even if a command fails -p, --prompt=STRING use STRING as an interactive prompt -r, --restricted run in restricted mode -s, --quiet, --silent suppress diagnostics -v, --verbose be verbose Start edit by reading in 'file' if given. If 'file' begins with a '!', read output of shell command. Exit status: 0 for a normal exit, 1 for environmental problems (file not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or invalid input file, 3 for an internal consistency error (eg, bug) which caused ed to panic. REPORTING BUGS
Report bugs to bug-ed@gnu.org Ed home page: http://www.gnu.org/software/ed/ed.html General help using GNU software: http://www.gnu.org/gethelp COPYRIGHT
Copyright (C) 1994 Andrew L. Moore. Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for Ed is maintained as a Texinfo manual. If the info and Ed programs are properly installed at your site, the com- mand info Ed should give you access to the complete manual. Ed 1.10 January 2014 ED(1)
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