Drezil/Bash-Oneliner
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# Bash-Oneliner
I am glad that you are here! I was working on bioinformatics a few years ago and was amazed by those single-word bash commands which are much faster than my dull scripts, time saved through learning command-line shortcuts and scripting. Recent years I am working on cloud computing and I keep recording those useful commands here. Not all of them is oneliner, but i put effort on making them brief and swift. I am mainly using Ubuntu, Amazon Linux, RedHat, Linux Mint, Mac and CentOS, sorry if the commands don't work on your system.
This blog will focus on simple bash commands for parsing data and Linux system maintenance that i acquired from work and LPIC exam. I apologize that there are no detailed citation for all the commands, but they are probably from dear Google and Stack Overflow.
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Esc + c
# converts letter under the cursor to uppercase, rest of the word to lowercase.
```
##### Bash commands vi mode
```bash
set -o vi
# change bash command mode to vi
ESC
# change to vi edit mode (when set -o vi is set)
k
# in vi edit mode - previous command
j
# in vi edit mode - next command
0
# in vi edit mode - beginning of the command
R
# in vi edit mode - replace current characters of command
w
# in vi edit mode - next word
b
# in vi edit mode - previous word
v
# in vi edit mode - edit current command in vi
```
##### Run history number (e.g. 53)
```bash
!53