How to bypass aliases Linux command
This post will guide you how to bypass an alias in bash shell for a single Linux command. How do I temporarily bypass an alias in bash shell. How to disable an alias in bash shell.
Bypassing Alias Linux command
If you have defined an alias df for “df -h” command in bash shell, and you want to disable this aliase temporarily, How to achieve it. This post will introduce you four methods to bypass alias linux command.
Method1: You can quote your alias command to call the acutal command, type:
# "df"
Or
# 'df"
Outputs:
devops@devops-osetc:~/working$ alias | grep df alias df='df -h' devops@devops-osetc:~/working$ df Filesystem Size Used Avail Use% Mounted on udev 475M 0 475M 0% /dev tmpfs 100M 3.7M 96M 4% /run /dev/sda1 19G 4.7G 13G 27% / tmpfs 496M 252K 496M 1% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 496M 0 496M 0% /sys/fs/cgroup tmpfs 100M 60K 100M 1% /run/user/1000 devops@devops-osetc:~/working$ "df" Filesystem 1K-blocks Used Available Use% Mounted on udev 485408 0 485408 0% /dev tmpfs 101576 3768 97808 4% /run /dev/sda1 19478204 4892000 13573724 27% / tmpfs 507876 252 507624 1% /dev/shm tmpfs 5120 4 5116 1% /run/lock tmpfs 507876 0 507876 0% /sys/fs/cgroup tmpfs 101576 60 101516 1% /run/user/1000
Method2: Using command to call alias command
# command df
Outputs:
devops@devops-osetc:~/working$ alias | grep df alias df='df -h' devops@devops-osetc:~/working$ df Filesystem Size Used Avail Use% Mounted on udev 475M 0 475M 0% /dev tmpfs 100M 3.7M 96M 4% /run /dev/sda1 19G 4.7G 13G 27% / tmpfs 496M 252K 496M 1% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 496M 0 496M 0% /sys/fs/cgroup tmpfs 100M 60K 100M 1% /run/user/1000 devops@devops-osetc:~/working$ command df Filesystem 1K-blocks Used Available Use% Mounted on udev 485408 0 485408 0% /dev tmpfs 101576 3768 97808 4% /run /dev/sda1 19478204 4892000 13573724 27% / tmpfs 507876 252 507624 1% /dev/shm tmpfs 5120 4 5116 1% /run/lock tmpfs 507876 0 507876 0% /sys/fs/cgroup tmpfs 101576 60 101516 1% /run/user/1000
Method3: Using Full Command Path to call Alias command
#/bin/df
Outputs:
devops@devops-osetc:~/working$ alias | grep df alias df='df -h' devops@devops-osetc:~/working$ /bin/df Filesystem 1K-blocks Used Available Use% Mounted on udev 485408 0 485408 0% /dev tmpfs 101576 3768 97808 4% /run /dev/sda1 19478204 4892000 13573724 27% / tmpfs 507876 252 507624 1% /dev/shm tmpfs 5120 4 5116 1% /run/lock tmpfs 507876 0 507876 0% /sys/fs/cgroup tmpfs 101576 60 101516 1% /run/user/1000
Method4: Using Backslash to call alias command
You can also use backslash character to call alias command to bypass alias linux command temporarily, type:
# \df
Outputs:
devops@devops-osetc:~/working$ alias | grep df alias df='df -h' devops@devops-osetc:~/working$ \df Filesystem 1K-blocks Used Available Use% Mounted on udev 485408 0 485408 0% /dev tmpfs 101576 3768 97808 4% /run /dev/sda1 19478204 4892000 13573724 27% / tmpfs 507876 252 507624 1% /dev/shm tmpfs 5120 4 5116 1% /run/lock tmpfs 507876 0 507876 0% /sys/fs/cgroup tmpfs 101576 60 101516 1% /run/user/1000
Unalias Command to Remove Aliases
If you want to unalias one alias linux command, you can use unalias command to remote alias. For example, type the following command to remote df alias command:
# unalias df
Outputs:
devops@devops-osetc:~/working$ alias | grep df alias df='df -h' devops@devops-osetc:~/working$ unalias df devops@devops-osetc:~/working$ alias | grep df devops@devops-osetc:~/working$
If you want to remove all alias commands in your current bash shell, you can execute the following command:
# unalias -a
Outputs:
devops@devops-osetc:~/working$ alias alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"' alias egrep='egrep --color=auto' alias fgrep='fgrep --color=auto' alias grep='grep --color=auto' alias l='ls -CF' alias la='ls -A' alias ll='ls -alF' alias ls='ls --color=auto' alias rm='rm -rf' devops@devops-osetc:~/working$ unalias -a devops@devops-osetc:~/working$ alias devops@devops-osetc:~/working$
