Bash: Difference between revisions

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type __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}
type __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}


# check by using if else conditional
# check by using if else conditional block
if hash __git_ps1 2>/dev/null;then echo '__git_ps1';\
if hash __git_ps1 2>/dev/null;then echo '__git_ps1';\
else echo 'no __git_ps1';fi
else echo 'no __git_ps1';fi

Revision as of 12:39, 28 May 2019

sudo systemctl stop firewalld
sudo systemctl stop ipchains
sudo systemctl stop iptables

sudo systemctl restart jira
sudo systemctl restart atlbitbucket
# clear all
history -c
history -w

# delete line
history -d 2013
history -w

for i in {1..50};do \
history -d 2013;done;\
history -w
command -v __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}
hash __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}
type __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}

# check by using if else conditional block
if hash __git_ps1 2>/dev/null;then echo '__git_ps1';\
else echo 'no __git_ps1';fi

References