History expansion in scripts
I have the following Bash script
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
set -H
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
pwd
last_command="!!"
echo $last_command
which prints
disabled
enabled
/home/user
!!
The first line of code checks to see if history expansion is enabled. The second enables history expansion. The third is the same as the first. Then its runs pwd and finally assigns what should be last command to last_command and prints this variable.
The history is not expanding. What is going on?
bash shell-script shell command-history history-expansion
asked 5 mins ago
History_expansionHistory_expansion
1
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I have the following Bash script
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
set -H
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
pwd
last_command="!!"
echo $last_command
which prints
disabled
enabled
/home/user
!!
The first line of code checks to see if history expansion is enabled. The second enables history expansion. The third is the same as the first. Then its runs pwd and finally assigns what should be last command to last_command and prints this variable.
The history is not expanding. What is going on?
bash shell-script shell command-history history-expansion
asked 5 mins ago
History_expansionHistory_expansion
1
New contributor
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have the following Bash script
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
set -H
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
pwd
last_command="!!"
echo $last_command
which prints
disabled
enabled
/home/user
!!
The first line of code checks to see if history expansion is enabled. The second enables history expansion. The third is the same as the first. Then its runs pwd and finally assigns what should be last command to last_command and prints this variable.
The history is not expanding. What is going on?
bash shell-script shell command-history history-expansion
asked 5 mins ago
History_expansionHistory_expansion
1
New contributor
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have the following Bash script
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
set -H
case $- in (*H*) echo enabled ;; (*) echo disabled ;; esac
pwd
last_command="!!"
echo $last_command
which prints
disabled
enabled
/home/user
!!
The first line of code checks to see if history expansion is enabled. The second enables history expansion. The third is the same as the first. Then its runs pwd and finally assigns what should be last command to last_command and prints this variable.
The history is not expanding. What is going on?
bash shell-script shell command-history history-expansion
bash shell-script shell command-history history-expansion
asked 5 mins ago
History_expansionHistory_expansion
1
New contributor
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 mins ago
History_expansionHistory_expansion
1
New contributor
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 mins ago
History_expansionHistory_expansion
1
New contributor
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 mins ago
History_expansionHistory_expansion
1
asked 5 mins ago
History_expansionHistory_expansion
1
1
New contributor
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
History_expansion is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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