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Bash Bypass Alias Linux/Unix Command
I defined mount bash shell alias as follows on my Linux system:
alias mount='mount | column -t'
However, I need to bash bypass alias for mounting the file system and another usage. How can I disable or bypass my bash shell aliases temporarily on a Linux, *BSD, macOS or Unix-like system?
You can define or display bash shell aliases with alias command. Once bash shell aliases created, they take precedence over external or internal commands. This page shows how to bypass bash aliases temporarily so that you can run actual internal or external command.
Four ways to bash bypass alias
Try any one of the following ways to run a command that is shadowed by a bash shell alias. Let us define an alias as follows:
alias mount='mount | column -t'
Run it as follows:
mount
Sample outputs:
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=8023572k,nr_inodes=2005893,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=1610240k,mode=755)
/dev/mapper/ubuntu--vg-root on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
/dev/sda1 on /boot type ext4 (rw,relatime,data=ordered)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
lxcfs on /var/lib/lxcfs type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
Method 1 - Use \command
Type the following command to temporarily bypass a bash alias called mount:
\mount
Method 2 - Use "command" or 'command'
Quote the mount command as follows to call actual /bin/mount:
"mount"
OR
'mount'
Method 3 - Use full command path
Use full binary path such as /bin/mount:
/bin/mount /bin/mount /dev/sda1 /mnt/sda
Method 4 - Use internal command
The syntax is:
command cmd command cmd arg1 arg2
To override alias set in .bash_aliases such as mount:
command mount command mount /dev/sdc /mnt/pendrive/
The 'command' run a simple command or display information about commands. It runs COMMAND with ARGS suppressing shell function lookup or aliases, or display information about the given COMMANDs.
A note about unalias command
To remove each alias from the list of defined aliases from the current session use unalias command:
unalias mount
To remove all alias definitions from the current bash session:
unalias -a
Make sure you update your ~/.bashrc or $HOME/.bash_aliases file. You must remove defined aliases if you want to remove them permanently:
vi ~/.bashrc
OR
joe $HOME/.bash_aliases
For more information see bash command man page online here or read it by typing the following command:
man bash
help command
help unalias
help alias
via: https://www.cyberciti.biz/faq/bash-bypass-alias-command-on-linux-macos-unix/
作者：Vivek Gite 译者：译者ID 校对：校对者ID