Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
#!/usr/bin/env bash
function install_icon.usage() {
cat << EOF
NAME
/scripts/sys/install_icon.sh - Download and install icon to /usr/local/bin/.
SYNTAX
/scripts/sys/install_icon.sh [-h]
EOF
}
function install_icon …Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
| Command | Description |
|---|---|
| uname -a | The full info of the machine. |
| uname | The type of OS, e.g., Linux, Darwin, etc. |
| uname -m | The architecture of the machine, e.g., x86_64, etc … |
Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
shopt -s extglob
Or you can run bash with the option -O extglob.
/bin/bash -O extglob -c "your command to run"
| Python | Bash | C/C++ | Java | Julia | |
|---|---|---|---|---|---|
| and | and | -a | && | && | && |
| or | or | -o | || | || | || |
| not | not | ! | ! | ! | ! |
| bit and | & | & | & | & | & |
| bit or | | | | | | | | | | |
| bit not | ~ | ~ | ~ | ~ | ~ |
| bit xor | ^ | ^ | ^ | ^ | ^ |
| vector and | |||||
| vector or | |||||
| vector not | |||||
| equals | == | -eq | == | == | == |
| not equal | != | -ne | != | != | != |
| greater than | > | -gt | > | > | > |
| less than | < | -lt | < | < | < |
| greater than or equal to | >= | -ge | >= | >= | >= |
| less than or equal to … |
https://stackoverflow.com/questions/229551/how-to-check-if-a-string-contains-a-substring-in-bash
not condition
if [ ! -d "$1" ]; then
fi
Generate 00, 01, ..., to 25.
for i in {00..25}; do echo $i; done
or
seq -f %02g 0 25